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Subject: 301/410 detail chart --- * for archives *
From: David Leibold <djcl@bnw.debe.fl.us>
Date: Sat, 27 Jul 91 11:06:19 EDT
Organization: Brave New World, Delray Beach, FL, USA
[Here's the detailed listing of how the 301/410 area code split in
Maryland is going to work out; this is a listing of prefixes, which
area code they have after the split, LATAs and other commentary.
Please put in the archives, with perhaps a mention of its existence.]
;
; NPA 301/410 Maryland 25 July 1991
;
; The following list is sorted in order of the prefix. At present
; all prefixes are under area code 301. However, after November 1991,
; those indicated with 410 under the NPA column will be active in
; the new area code 410. After November 1992, they will no longer
; be area code 301 prefixes but in 410 area. Special prefixes that
; will be assigned in both area codes are listed twice, for the
; convenience of those using utilities like grep.
;
;NPA NXX Place LATA Comment
301 203 Oxon Hill [W]
410 205 Baltimore [B]
301 206 Berwyn [W]
410 208 Berlin [S]
301 209 Hyattsville [W]
301 210 Laurel [W]
410 213 Ocean City [S]
301 217 Rockville [W]
301 220 Berwyn [W]
410 221 Cambridge [S]
410 222 Severn 2 [B] <S2>
301 223 Williamsport [H]
410 224 Annapolis [B]
410 225 Baltimore [B]
410 226 Oxford [S]
301 227 Bethesda [W]
410 228 Cambridge [S]
301 229 Bethesda [W]
301 230 Kensington [W]
301 231 Kensington [W]
410 232 Baltimore [B]
410 233 Baltimore [B]
410 234 Baltimore [B]
410 235 Baltimore [B]
301 236 Layhill [W]
410 237 Baltimore [B]
301 238 Clinton [W]
410 239 Reisterstown [B] Hampstead
301 240 Rockville [W]
301 241 Highfield [H]
410 242 Arbutus [B]
410 243 Baltimore [B]
410 244 Baltimore [B]
301 245 Bittinger [H]
301 246 Nanjemoy [W]
410 247 Arbutus [B]
301 248 Oxon Hill [W]
301 249 Bowie-Glenn Dale [W]
410 250 Ocean City [S]
301 251 Rockville [W]
410 252 Towson [B]
301 253 Damascus [W]
410 254 Baltimore [B]
410 255 Armiger-Gibson Isl. [B]
410 256 Parkville [B]
410 257 North Beach [B]
301 258 Rockville [W]
301 259 Tompkinsville [W]
410 260 Severna Park 1 [B] Annapolis {4}
301 261 Bowie-Glenn Dale [W]
301 262 Bowie-Glenn Dale [W]
410 263 Annapolis [B]
301 264 Mount Savage [H]
410 265 Woodlawn [B]
410 266 Annapolis [B]
410 267 Annapolis [B]
410 268 Annapolis [B]
410 269 Severna Park 1 [B] {4}
301 270 Silver Spring [W]
301 271 Thurmont [H]
410 272 Aberdeen [B]
410 273 Aberdeen [B]
301 274 Hughesville [W]
410 275 Cecilton [S]
410 276 Baltimore [B]
301 277 Hyattsville [W]
410 278 Aberdeen [B]
301 279 Rockville [W]
410 280 Annapolis [B]
410 281 Woodlawn [B]
410 282 Dundalk [B]
301 283 Oxon Hill [W] Accokeek
410 284 Dundalk [B]
410 285 Dundalk [B]
301 286 Berwyn [W]
410 287 North East [B]
410 288 Dundalk [B]
410 289 Ocean City [S]
410 290 Columbia [B]
410 291 Baltimore [B]
301 292 Oxon Hill [W] Ft Washington
301 293 Myersville [H]
301 294 Rockville [W]
301 295 Bethesda [W]
410 296 Towson [B]
301 297 Clinton [W]
410 298 Woodlawn [B]
301 299 Rockville [W]
410 303 Columbia [B]
301 306 Hyattsville [W]
410 307 Towson [B]
301 309 Rockville [W]
410 312 Columbia [B]
410 313 Ellicott City [B]
301 314 Hyattsville [W]
410 316 Cockeysville [B] Hunt Valley
301 317 Laurel [W]
410 319 Baltimore [B]
301 320 Bethesda [W]
410 321 Towson [B]
301 322 Hyattsville [W]
410 323 Baltimore [B]
410 325 Baltimore [B]
410 326 Solomons [B]
410 327 Baltimore [B]
410 328 Baltimore [B]
410 329 Cockeysville [B]
301 330 Gaithersburg [W]
301 331 Hagerstown [H]
410 332 Baltimore [B]
410 333 Baltimore [B]
301 334 Oakland [H]
410 335 Chase [B]
301 336 Capitol Heights [W] Seat Pleasant
410 337 Towson [B]
410 338 Baltimore [B]
410 339 Towson [B]
301 340 Rockville [W]
301 341 Hyattsville [W]
410 342 Baltimore [B]
410 343 Sparks-Glencoe [B]
301 344 Berwyn [W]
301 345 Berwyn [W]
410 346 Silver Run [B]
410 347 Baltimore [B]
410 348 Still Pond [S]
301 349 Poolesville [W]
301 350 Capitol Heights [W]
410 351 Baltimore [B]
410 352 Bishopville [S]
301 353 Rockville [W]
410 354 Baltimore [B]
410 355 Baltimore [B]
410 356 Pikesville [B]
410 357 Parkton [B]
410 358 Baltimore [B]
301 359 Westernport [H]
410 360 Armiger-Gibson Isl. [B]
410 361 Baltimore [B]
410 362 Baltimore [B]
410 363 Pikesville [B]
410 364 Hillsboro [S]
301 365 Bethesda [W]
410 366 Baltimore [B]
410 367 Baltimore [B]
410 368 Baltimore [B]
301 369 Berwyn [W] Laurel
410 370 Catonsville [B]
301 371 Braddock Heights-Middletown [H]
301 372 Clinton [W] Brandywine
301 373 Leonardtown [W] Hollywood
410 374 Hampstead [B]
301 375 Indian Head [W] Bryans Road
410 376 Vienna [S]
410 377 Towson [B]
410 378 Port Deposit [B]
410 379 Elkridge [B]
301 380 Bethesda [W]
410 381 Columbia [B]
410 382 Baltimore [B]
410 383 Baltimore [B]
301 384 Layhill [W]
410 385 Baltimore [B]
301 386 Hyattsville [W]
301 387 Oakland [H]
410 388 Sparrows Point [B]
410 389 Baltimore [B]
301 390 Bowie-Glenn Dale [W]
410 391 Essex [B]
410 392 Elkton [B]
410 393 Baltimore [B]
301 394 Silver Spring [W]
301 395 Oldtown [H]
410 396 Baltimore [B]
410 397 Wingate [S]
410 398 Elkton [B]
301 401 Frederick [H]
301 402 Bethesda [W]
301 403 Hyattsville [W]
410 404 Baltimore [B]
301 405 Hyattsville [W]
301 409 Berwyn [W]
301 414 Damascus [W]
301 416 Myersville [H]
301 417 Rockville [W]
301 419 Berwyn [W]
301 420 Capitol Heights [W] Suitland
301 421 Ashton [W]
301 422 Hyattsville [W]
301 423 Capitol Heights [W] Marlow Heights
301 424 Rockville [W]
410 425 Smith Island [S]
410 426 Baltimore [B]
301 427 Silver Spring [W]
301 428 Rockville [W]
410 429 Worthington [B]
410 430 Baltimore [B]
301 431 Silver Spring [W]
301 432 Keedysville [H]
410 433 Baltimore [B]
301 434 Silver Spring [W]
410 435 Baltimore [B]
301 436 Hyattsville [W]
410 437 Armiger-Gibson Isl. [B]
410 438 Sudlersville [S]
301 439 Silver Spring [W]
410 440 Catonsville [B]
301 441 Berwyn [W]
410 442 Ellicott City [B]
301 443 Kensington [W]
410 444 Baltimore [B]
301 445 Silver Spring [W]
301 447 Emmitsburg [H]
410 448 Baltimore [B]
301 449 Capitol Heights [W] Camp Springs
410 450 Baltimore [B]
410 451 Severn 2 [B] <S2>
410 452 Cardiff [B]
301 453 Kitzmiller [H]
301 454 Hyattsville [W]
410 455 Catonsville [B]
410 456 Baltimore [B]
410 457 Darlington [B]
410 458 Baltimore [B]
301 459 Hyattsville [W]
301 460 Kensington [W]
410 461 Ellicott City [B]
410 462 Baltimore [B]
301 463 Lonaconing [H]
301 464 Bowie-Glenn Dale [W]
410 465 Ellicott City [B]
410 466 Baltimore [B]
410 467 Baltimore [B]
301 468 Kensington [W]
301 469 Bethesda [W]
301 470 Bowie-Glenn Dale [W] Laurel
410 471 Elkridge [B]
410 472 Sparks-Glencoe [B]
301 473 Frederick [H]
301 474 Berwyn [W]
301 475 Leonardtown [W]
410 476 Trappe [S]
410 477 Sparrows Point [B]
301 478 Flintstone [H]
410 479 Denton [S]
301 480 Bethesda [W]
410 481 Baltimore [B]
410 482 Greensboro [S]
410 483 Baltimore [B]
410 484 Pikesville [B]
410 485 Baltimore [B]
410 486 Pikesville [B]
301 487 Myersville [H]
410 488 Baltimore [B]
410 489 Glenwood [B]
301 490 Laurel [W]
301 491 Hagerstown [H]
301 492 Bethesda [W]
301 493 Bethesda [W]
410 494 Towson [B]
301 495 Silver Spring [W]
301 496 Bethesda [W]
301 497 Laurel [W]
301 498 Laurel [W]
301 499 Capitol Heights [W]
301 502 Silver Spring [W] # cellular
301 505 Oxon Hill [W]
301 507 Berwyn [W]
301 509 Silver Spring [W] # cellular
301 510 Berwyn [W]
301 513 Berwyn [W]
410 516 Baltimore [B]
301 518 Silver Spring [W] # cellular
301 520 Silver Spring [W] # cellular
410 521 Randallstown [B]
410 522 Baltimore [B]
410 523 Baltimore [B]
410 524 Ocean City [S]
410 525 Baltimore [B]
410 526 Reisterstown [B]
410 527 Cockeysville [B] Hunt Valley
410 528 Baltimore [B]
410 529 Parkville [B]
301 530 Bethesda [W]
410 531 Columbia [B]
410 532 Baltimore [B]
410 533 Annapolis [B]
410 534 Baltimore [B]
410 535 Prince Frederick [B]
410 536 Arbutus [B]
410 537 Baltimore [B] C&P Tel. business ofc
410 538 Fork [B]
410 539 Baltimore [B]
301 540 Gaithersburg [W]
410 541 Severna Park 2 [B] {4}
410 542 Baltimore [B]
410 543 Salisbury [S]
410 544 Severna Park 1 [B] {4}
410 546 Salisbury [S]
410 547 Baltimore [B]
410 548 Salisbury [S]
410 549 Sykesville [B]
410 550 Baltimore [B]
410 551 Severn 1 [B] <S1>
301 552 Berwyn [W]
410 553 Glen Burnie [B]
410 554 Baltimore [B]
301 555 (Directory Assistance)
410 555 (Directory Assistance)
410 556 Church Hill [S]
410 557 Fork [B] North East
410 558 Baltimore [B]
301 559 Hyattsville [W]
410 560 Towson [B] Lutherville-Timonium
410 561 Towson [B]
410 562 Annapolis [B]
410 563 Baltimore [B]
301 564 Bethesda [W]
301 565 Silver Spring [W]
410 566 Baltimore [B]
301 567 Oxon Hill [W]
301 568 Capitol Heights [W]
410 569 Edgewood [B] (formerly Severn?)
301 570 Ashton [W]
301 571 Bethesda [W]
301 572 Silver Spring [W]
410 573 Annapolis [B]
410 574 Essex [B]
410 575 Fork [B] North East
410 576 Baltimore [B]
301 577 Hyattsville [W]
410 578 Baltimore [B]
301 579 Brandywine [W] Baden
301 580 Silver Spring [W]
410 581 Pikesville [B] Owings Mills
301 582 Hagerstown [H]
410 583 Towson [B]
410 584 Cockeysville [B] Hunt Valley
301 585 Silver Spring [W]
410 586 Prince Frederick [B]
301 587 Silver Spring [W]
301 588 Silver Spring [W]
301 589 Silver Spring [W]
301 590 Rockville [W]
410 591 Baltimore [B]
410 592 Fork [B]
301 593 Silver Spring [W]
410 594 Woodlawn [B]
301 595 Berwyn [W]
301 596 Laurel 2 [W] <L2>
410 597 Woodlawn [B]
301 598 Layhill [W]
301 599 Capitol Heights [W]
301 601 Rockville [W]
410 602 Pikesville [B]
301 604 Laurel [W]
410 605 Baltimore [B]
301 606 Frederick [H]
301 607 Damascus [W]
301 608 Silver Spring [W]
410 612 Edgewood [B]
410 613 Baltimore [B]
301 618 Hyattsville [W]
301 620 Frederick [H]
301 621 Bowie-Glenn Dale [W] Laurel
301 622 Silver Spring [W]
410 623 Marion [S]
410 624 Baltimore [B]
410 625 Baltimore [B]
410 626 Annapolis [B]
301 627 Marlboro [W]
410 628 Cockeysville [B]
301 629 Bowie-Glenn Dale [W]
301 630 Oxon Hill [W]
410 631 Baltimore [B]
410 632 Snow Hill [S]
410 633 Baltimore [B]
410 634 Ridgely [S]
410 635 New Windsor [B]
410 636 Brooklyn Park-Linthicum [B]
410 637 Baltimore [B]
410 638 Bel Air [B]
410 639 Rock Hall [S]
301 640 Rockville [W]
410 641 Berlin [S]
410 642 Perryville [B]
410 643 Stevensville [S]
410 644 Baltimore [B]
301 645 Waldorf [W]
410 646 Baltimore [B]
410 647 Severna Park 1 [B] {4}
410 648 Galena [S]
301 649 Kensington [W]
301 650 Silver Spring [W]
410 651 Princess Anne [S]
301 652 Bethesda [W]
410 653 Pikesville [B]
301 654 Bethesda [W]
410 655 Randallstown [B]
301 656 Bethesda [W]
301 657 Bethesda [W]
410 658 Rising Sun [B] independent exchange
410 659 Baltimore [B]
410 661 Parkville [B]
301 662 Frederick [H]
301 663 Frederick [H]
410 664 Baltimore [B]
410 665 Parkville [B]
410 666 Cockeysville [B]
410 667 Cockeysville [B]
410 668 Parkville [B]
410 669 Baltimore [B]
301 670 Rockville [W]
410 671 Edgewood [B]
410 672 Odenton [B]
410 673 Preston [S]
410 674 Odenton [B]
410 675 Baltimore [B]
410 676 Edgewood [B]
410 677 Severn 1 [B] <S1>
301 678 Hancock [H]
410 679 Fork [B] North East
301 680 Silver Spring [W]
301 681 Silver Spring [W]
410 682 Essex [B]
410 683 Cockeysville [B]
410 684 Glen Burnie [B] Friendship
410 685 Baltimore [B]
410 686 Essex [B]
410 687 Essex [B]
410 688 Odenton [B] Ft Meade {1}
301 689 Frostburg [H]
410 691 Glen Burnie [B] Friendship
410 692 Jarrettsville [B]
410 693 Annapolis [B]
301 694 Frederick [H]
301 695 Frederick [H]
301 696 Frederick [H]
301 697 Cumberland [H]
301 698 Frederick [H]
301 699 Hyattsville [W]
301 702 Capitol Heights [W]
301 705 Waldorf [W]
301 707 Cumberland [H]
410 712 Elkridge [B]
301 713 Silver Spring [W]
301 714 Hagerstown [H]
301 718 Bethesda [W]
410 719 Catonsville [B]
410 720 Ellicott City [B]
410 721 Crofton [B]
301 722 Cumberland [H]
410 723 Ocean City [S]
301 724 Cumberland [H]
301 725 Laurel [W]
410 726 Salisbury [S]
410 727 Baltimore [B]
410 728 Baltimore [B]
301 729 Cumberland [H]
410 730 Columbia [B]
301 731 Hyattsville [W]
410 732 Baltimore [B]
301 733 Hagerstown [H]
410 734 Churchville [B]
301 735 Capitol Heights [W] Suitland
301 736 Capitol Heights [W] Suitland
301 737 Lexington Park-Great Mills [W]
301 738 Rockville [W]
301 739 Hagerstown [H]
410 740 Columbia [B]
410 741 West River [B]
410 742 Salisbury [S]
301 743 Indian Head [W]
410 744 Catonsville [B]
410 745 St Michaels [S]
301 746 Friendsville [H]
410 747 Catonsville [B]
410 748 Ellicott City [B]
410 749 Salisbury [S]
410 750 Ellicott City [B]
410 751 Westminster [B] Taneytown
410 752 Baltimore [B]
301 753 Indian Head [W] Oxon Hill
410 754 Federalsburg [S]
410 755 Warwick [S]
410 756 Taneytown [B]
410 757 Annapolis [B]
410 758 Centreville [S]
301 759 Cumberland [H]
410 760 Glen Burnie [B]
410 761 Glen Burnie [B]
301 762 Rockville [W]
410 764 Baltimore [B]
410 765 Glen Burnie [B] Friendship
410 766 Glen Burnie [B]
410 768 Glen Burnie [B]
301 769 Leonardtown [W] Milestown
301 770 Kensington [W]
410 771 Cockeysville [B] Hunt Valley
301 772 Hyattsville [W]
301 773 Hyattsville [W]
301 774 Ashton [W]
410 775 Union Bridge [B]
301 776 Laurel [W]
301 777 Cumberland [H]
410 778 Chestertown [S]
301 779 Hyattsville [W]
410 780 Essex [B]
410 781 Ellicott City [B]
301 782 Brandywine [W]
410 783 Baltimore [B]
410 784 Deal Island [S]
410 785 Cockeysville [B] Hunt Valley
301 786 McCoole [H]
410 787 Glen Burnie [B]
410 788 Catonsville [B]
410 789 Brooklyn Park-Linthicum [B]
301 790 Hagerstown [H]
301 791 Hagerstown [H]
410 792 Waterloo [B] Laurel
410 793 Severna Park 2 [B] Annapolis {4}
301 794 Bowie-Glenn Dale [W]
410 795 Sykesville [B]
410 796 Elkridge [B]
301 797 Hagerstown [H]
410 798 West River [B]
410 799 Waterloo [B]
301 805 Bowie-Glenn Dale [W]
410 806 Towson [B]
301 807 Silver Spring [W]
301 808 Capitol Heights [W]
410 813 Waterloo [B]
301 816 Kensington [W]
410 820 Easton [S]
410 821 Towson [B]
410 822 Easton [S]
410 823 Towson [B]
301 824 Smithsburg [H]
410 825 Towson [B]
301 826 (Accident) [H] {2} likely de-tolled
410 827 Queenstown [S]
410 828 Towson [B]
301 829 Mount Airy [H]
410 830 Towson [B]
301 831 Damascus [W] Mt Airy-Newmarket svc
410 832 Towson [B]
410 833 Reisterstown [B]
301 834 Brunswick [H]
410 835 Willards [S]
410 836 Bel Air [B]
410 837 Baltimore [B]
410 838 Bel Air [B]
301 839 Oxon Hill [W]
301 840 Rockville [W]
410 841 Severna Park 1 [B] Annapolis {4}
301 842 Clear Spring [H]
301 843 Waldorf [W] some sources dispute
410 844 Baltimore [B] time of day service {5}
301 845 Walkersville [H]
301 846 Frederick [H]
410 847 Wingate [S]
410 848 Westminster [B]
410 849 Sherwood Forest [B]
410 850 Glen Burnie [B] Friendship
301 851 Hyattsville [W]
301 852 Hyattsville [W]
301 853 Hyattsville [W]
301 854 Ashton 2 [W] <A2> Highland
301 855 Marlboro [W]
301 856 Clinton [W]
410 857 Westminster [B]
301 858 Bowie-Glenn Dale [W]
410 859 Glen Burnie [B] Friendship
410 860 Salisbury [S]
410 861 Westminster [B]
301 862 Lexington Park-Great Mills [W]
301 863 Lexington Park-Great Mills [W]
301 864 Hyattsville [W]
301 865 New Market [H]
410 866 Essex [B]
410 867 West River [B]
301 868 Clinton [W]
301 869 Gaithersburg [W]
301 870 La Plata [W]
301 871 Kensington [W]
301 872 Ridge [W]
410 873 Nanticoke [S]
301 874 Buckeystown [H]
410 875 Sykesville [B] Westminster
410 876 Reisterstown [B] Westminster
410 877 Fallston [B]
410 878 Baltimore [B] Ft Ritchie {3}
410 879 Fork [B] North East
410 880 Waterloo [B] Laurel
301 881 Kensington [W]
410 882 Parkville [B]
410 883 Sharptown [S]
301 884 Mechanicsville [W]
410 885 Chesapeake City [S]
410 886 Tilghman [S]
410 887 Towson [B]
301 888 Clinton [W] Baden
410 889 Baltimore [B]
301 890 Layhill [W]
301 891 Silver Spring [W]
410 892 Glen Burnie [B] Friendship
410 893 Fork [B]
301 894 Oxon Hill [W]
301 895 Grantsville [H]
410 896 Delmar [S]
301 897 Bethesda [W]
301 898 Frederick [H] Walkersville
410 899 Capitol Heights [W]
301 905 Silver Spring [W]
410 906 Baltimore [B]
301 907 Bethesda [W]
301 913 Bethesda [W]
301 915 915 Service special toll services
410 915 915 Service special toll services
301 916 Gaithersburg [W]
301 918 Hyattsville [W]
301 919 Bethesda [W]
410 920 North East [B]
301 921 Rockville [W]
410 922 Randallstown [B]
410 923 Millersville [B]
301 924 Layhill [W]
301 925 Capitol Heights [W] Seat Pleasant
301 926 Gaithersburg [W]
301 927 Hyattsville [W]
410 928 Millington [S]
301 929 Kensington [W]
301 930 Silver Spring [W]
410 931 Parkville [B]
301 932 Waldorf [W] La Plata
301 933 Kensington [W]
301 934 La Plata [W]
301 935 Berwyn [W]
410 936 Weather Service - Baltimore [B]
301 937 Berwyn [W]
410 938 Towson [B]
410 939 Havre de Grace [B]
301 940 Hyattsville [W]
410 941 Jarrettsville [B] once listed Stewartstown
301 942 Kensington [W]
410 943 Hurlock [S]
410 944 Woodlawn [B]
410 945 Baltimore [B]
301 946 Kensington [W]
410 947 Baltimore [B]
301 948 Rockville [W]
301 949 Kensington [W]
301 950 (LD Carrier Access) for alternate long distance
410 950 (LD Carrier Access) for alternate long distance
301 951 Bethesda [W]
301 952 Marlboro [W]
301 953 Berwyn [W] <B2> Laurel
301 954 Baltimore [B] C&P repair/business
410 954 Baltimore [B] C&P repair/business
410 955 Baltimore [B]
410 956 Annapolis [B]
410 957 Pocomoke [S]
410 960 Baltimore [B]
301 961 Bethesda [W]
410 962 Baltimore [B]
301 963 Gaithersburg [W]
410 964 Columbia [B]
410 965 Woodlawn [B]
410 966 Woodlawn [B]
301 967 Capitol Heights [W] Suitland
410 968 Crisfield [S]
410 969 Severn 2 [B] <S2>
301 970 Bowie-Glenn Dale [W]
410 971 Catonsville [B]
301 972 Gaithersburg [W]
301 973 Bowie-Glenn Dale [W]
410 974 Severna Park 1 [B] Annapolis {4}
301 975 Rockville [W]
301 976 976 Service special toll services
410 976 976 Service special toll services
301 977 Gaithersburg [W]
410 978 Catonsville [B]
410 979 Catonsville [B]
301 980 Silver Spring [W] # cellular
301 981 Capitol Heights [W] Andrews AFB
301 982 Berwyn [W]
301 983 Rockville [W]
301 984 Kensington [W]
301 985 Bethesda [W]
301 986 Bethesda [W]
410 987 Severn 2 [B] <S2>
410 988 Ellicott City [B]
301 989 Layhill [W]
301 990 Gaithersburg [W]
410 991 Annapolis [B]
410 992 Columbia [B]
410 993 Glen Burnie [B] Friendship
301 994 Lexington Park-Great Mills [W] Valley Lee
410 995 Ellicott City [B]
410 996 Elkton [B]
410 997 Columbia [B]
410 998 Pikesville [B] Owings Mills
410 999 Baltimore [B]
;
; Codes for LATAs:
; [B] - Baltimore LATA
; [H] - Hagerstown LATA
; [S] - Salisbury LATA
; [W] - Washington DC LATA
;
; Comment Symbols and Notes:
;
; # - known cellular service
;
; <A2> - this Ashton prefix has additional local calling area (Ellicott
; City) and has been seen on phone bills as Clarksville
; <B2> - this Berwyn prefix has additional local calling area
; <L2> - this Laurel prefix has additional local calling area:
; Columbia service
; <S1> - Severn 1 has extra local calling access
; <S2> compared to Severn 2
;
; {1} - one source claims Waterloo; other sources claim that this
; is a Berwyn exchange in Washington Metro; consensus seems
; that this will go to area 410, or it could be on an
; aliased exchange
; {2} - Accident exchange seems to have been absorbed into
; Friendsville 746 prefix according to recent information
; {3} - 878 prefix serves Ft Ritchie but sources seem to converge
; on calling it a Baltimore prefix. C&P help line claims
; this will remain a 301 area code prefix after the split.
; {4} - Severna Park 2 has extra local calling access compared
; to Severna Park 1
; {5} - 844.1212 listed for time inquiries
;
; Other Notes:
;
; The C&P automated help line service provides information on where
; prefixes will split and other details of the 301/410 split; it can
; be reached by calling 1 800 477 4704 (apparently reachable throughout
; the U.S.) However, this help line may be missing a few prefixes (or
; has treated a few as special cases): for instance 303 Columbia and
; 481 Baltimore. Special prefixes like 555 or 976 are not covered by
; this service.
;
; The 301/410 split is done quite neatly along LATA lines. The
; Washington DC and Hagerstown LATAs will remain in 301. The
; Baltimore and Salisbury LATAs will become area code 410.
;
; Acknowledgements to various sources from telco information (phone books,
; etc) and carriers. Thanks also to Carl Moore (cmoore@BRL.MIL) for
; helping with uncertain and hard-to-determine prefixes. Scott R. Houck
; (with data from David Hogben) wrote a utility to determine places
; for Washington DC area exchanges; some of this data was useful for
; corroborating Maryland prefixes in the Washington DC Metro local area.
