| Southwestern Ontario Area Code 548 Telephone Exchanges / Prefixes |
|---|
| Major Cities/Towns: London - Kitchener-Waterloo - Brantford - Mount Forest - Listowel |
|---|
| Prefix | Company | Status | Location |
|---|
| 254 | Wightman Communications Ltd. | Assigned | Durham |
| 256 | Fibernetics Corporation | Assigned | Orangeville |
| 273 | Fibernetics Corporation | Assigned | Delhi |
| 274 | Fibernetics Corporation | Assigned | Jarvis |
| 275 | Fibernetics Corporation | Assigned | Langton |
| 276 | Fibernetics Corporation | Assigned | Port Dover |
| 277 | Fibernetics Corporation | Assigned | Port Rowan |
| 278 | Fibernetics Corporation | Assigned | Waterford |
| 285 | Quadro Communications Co-operative Inc. | Assigned | Thamesford |
| 356 | Fibernetics Corporation | Assigned | Cargill |
| 357 | Fibernetics Corporation | Assigned | Chatsworth |
| 358 | Fibernetics Corporation | Assigned | Chesley |
| 359 | Fibernetics Corporation | Assigned | Feversham |
| 360 | Fibernetics Corporation | Assigned | Flesherton |
| 361 | Fibernetics Corporation | Assigned | Hanover |
| 362 | Fibernetics Corporation | Assigned | Hepworth |
| 363 | Fibernetics Corporation | Assigned | Markdale |
| 364 | Fibernetics Corporation | Assigned | Meaford |
| 365 | Fibernetics Corporation | Assigned | Sauble Beach |
| 366 | Fibernetics Corporation | Assigned | Southampton |
| 367 | Fibernetics Corporation | Assigned | Tara |
| 368 | Fibernetics Corporation | Assigned | Thornbury |
| 369 | Fibernetics Corporation | Assigned | Wiarton |
| 409 | Iristel Inc. | Assigned | Goderich |
| 457 | Iristel Inc. | Assigned | Clinton |
| 540 | Fibernetics Corporation | Assigned | Atwood |
| 541 | Fibernetics Corporation | Assigned | Dublin |
| 542 | Fibernetics Corporation | Assigned | Harriston |
| 543 | Fibernetics Corporation | Assigned | Mitchell |
| 544 | Fibernetics Corporation | Assigned | Monkton |
| 545 | Fibernetics Corporation | Assigned | Palmerston |
| 546 | Fibernetics Corporation | Assigned | Shakespeare |
| 547 | Fibernetics Corporation | Assigned | St. Marys |
| 549 | Fibernetics Corporation | Assigned | Tavistock |
| 834 | TELUS Integrated Communications | Assigned | Brigden |
| 835 | TELUS Integrated Communications | Assigned | Port Lambton |
| 836 | TELUS Integrated Communications | Assigned | Sombra |
| 843 | Brooke Telecom Co-operative Ltd. | Assigned | Petrolia |
| 845 | Brooke Telecom Co-operative Ltd. | Assigned | Wyoming |
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| 211 | | For Special Use | |
| 311 | | For Special Use | |
| 411 | | For Special Use | |
| 511 | | For Special Use | |
| 555 | | For Special Use | |
| 611 | | For Special Use | |
| 711 | | For Special Use | |
| 811 | | For Special Use | |
| 911 | | For Special Use | |
| 950 | | For Special Use | |
| 976 | | For Special Use | |
| 200 | IXICA Communications Inc. | In Service | Belle River |
| 201 | Bell Canada | In Service | Chatham |
| 202 | Bell Canada | In Service | Clinton |
| 203 | Bell Canada | In Service | Sarnia |
| 204 | Bell Canada | In Service | Windsor |
| 205 | Bell Canada | In Service | St. Thomas |
| 206 | Bell Canada | In Service | London |
| 207 | Bell Canada | In Service | Woodstock |
| 208 | Bell Canada | In Service | Owen Sound |
| 209 | Bell Canada | In Service | Guelph |
| 210 | Bell Canada | In Service | Brantford |
| 212 | Bell Canada | In Service | Kitchener-Waterloo |
| 213 | Bell Canada | In Service | Orangeville |
| 214 | Bell Canada | In Service | Simcoe |
| 215 | Bell Canada | In Service | Stratford |
| 216 | Bell Canada | In Service | London |
| 217 | Bell Canada | In Service | London |
| 218 | Bell Canada | In Service | Galt |
| 219 | Bell Canada | In Service | Kitchener-Waterloo |
| 220 | TELUS Integrated Communications | In Service | Harriston |
| 221 | TELUS Integrated Communications | In Service | Mitchell |
| 222 | TELUS Integrated Communications | In Service | Palmerston |
| 223 | TELUS Integrated Communications | In Service | Tavistock |
| 224 | TELUS Integrated Communications | In Service | Bothwell |
| 225 | TELUS Integrated Communications | In Service | Burford |
| 227 | TELUS Integrated Communications | In Service | Elmira |
| 228 | TELUS Integrated Communications | In Service | New Hamburg |
| 229 | TELUS Integrated Communications | In Service | Watford |
| 230 | TELUS Integrated Communications | In Service | Pelee Island |
| 231 | TELUS Integrated Communications | In Service | Norwich |
| 232 | ISP Telecom | In Service | Brights Grove |
| 233 | ISP Telecom | In Service | Petrolia |
| 234 | Fibernetics Corporation | In Service | Ailsa Craig |
| 235 | Fibernetics Corporation | In Service | Centralia |
| 236 | Fibernetics Corporation | In Service | Crediton |
| 237 | Fibernetics Corporation | In Service | Lucan |
| 238 | Fibernetics Corporation | In Service | Nairn |
| 239 | Fibernetics Corporation | In Service | Belmont |
| 240 | Fibernetics Corporation | In Service | Melbourne |
| 241 | Fibernetics Corporation | In Service | Mount Brydges |
| 242 | Fibernetics Corporation | In Service | Wardsville |
| 243 | Fibernetics Corporation | In Service | Dorchester |
| 244 | Fibernetics Corporation | In Service | Harrietsville |
| 245 | Fibernetics Corporation | In Service | Thorndale |
| 246 | Fibernetics Corporation | In Service | Ilderton |
| 247 | Fibernetics Corporation | In Service | Kerwood |
| 248 | Fibernetics Corporation | In Service | Goderich |
| 249 | Fibernetics Corporation | In Service | Belle River |
| 250 | ISP Telecom | In Service | Corunna |
| 251 | ISP Telecom | In Service | Wyoming |
| 252 | ISP Telecom | In Service | Emeryville |
| 253 | ISP Telecom | In Service | La Salle |
| 255 | Rogers Communications Canada Inc. (Wireless) | In Service | Kitchener-Waterloo |
| 257 | Fibernetics Corporation | In Service | Comber |
| 258 | Fibernetics Corporation | In Service | Stoney Point |
| 259 | Fibernetics Corporation | In Service | Woodslee |
| 260 | Fibernetics Corporation | In Service | Emeryville |
| 261 | Fibernetics Corporation | In Service | Pleasant Park |
| 262 | Fibernetics Corporation | In Service | Harrow |
| 263 | Fibernetics Corporation | In Service | La Salle |
| 264 | Fibernetics Corporation | In Service | Maidstone |
| 265 | Fibernetics Corporation | In Service | McGregor |
| 266 | Fibernetics Corporation | In Service | Pelee Island |
| 267 | Fibernetics Corporation | In Service | Wheatley |
| 268 | Fibernetics Corporation | In Service | Arthur |
| 269 | Fibernetics Corporation | In Service | Dundalk |
| 270 | Fibernetics Corporation | In Service | Grand Valley |
| 271 | Fibernetics Corporation | In Service | Holstein |
| 272 | Fibernetics Corporation | In Service | Mount Forest |
| 282 | Rogers Communications Canada Inc. | In Service | St. George |
| 288 | Rogers Communications Canada Inc. (Cable) | In Service | Kitchener-Waterloo |
| 299 | IXICA Communications Inc. | In Service | Comber |
| 300 | IXICA Communications Inc. | In Service | Stoney Point |
| 322 | Rogers Communications Canada Inc. (Cable) | In Service | Drumbo |
| 328 | Bell Mobility | In Service | Brantford |
| 330 | Rogers Communications Canada Inc. (Cable) | In Service | Ilderton |
| 331 | Rogers Communications Canada Inc. (Wireless) | In Service | Simcoe |
| 333 | Fido Solutions Inc. | In Service | Kitchener-Waterloo |
| 335 | Rogers Communications Canada Inc. (Wireless) | In Service | Mount Forest |
| 336 | Rogers Communications Canada Inc. (Wireless) | In Service | Mount Forest |
| 337 | Rogers Communications Canada Inc. (Wireless) | In Service | Mount Forest |
| 338 | Rogers Communications Canada Inc. | In Service | Brantford |
| 339 | Rogers Communications Canada Inc. (Wireless) | In Service | Mount Forest |
| 340 | Rogers Communications Canada Inc. (Wireless) | In Service | London |
| 341 | Rogers Communications Canada Inc. (Wireless) | In Service | London |
| 342 | Rogers Communications Canada Inc. (Wireless) | In Service | London |
| 343 | Rogers Communications Canada Inc. (Wireless) | In Service | London |
| 344 | Rogers Communications Canada Inc. (Wireless) | In Service | London |
| 345 | Rogers Communications Canada Inc. (Wireless) | In Service | London |
| 346 | Rogers Communications Canada Inc. (Wireless) | In Service | London |
| 347 | Rogers Communications Canada Inc. (Wireless) | In Service | London |
| 348 | Rogers Communications Canada Inc. (Wireless) | In Service | London |
| 349 | Rogers Communications Canada Inc. (Wireless) | In Service | London |
| 355 | Rogers Communications Canada Inc. (Wireless) | In Service | Listowel |
| 383 | Rogers Communications Canada Inc. | In Service | Shakespeare |
| 388 | Rogers Communications Canada Inc. (Wireless) | In Service | London |
| 399 | IXICA Communications Inc. | In Service | Emeryville |
| 400 | IXICA Communications Inc. | In Service | Essex |
| 408 | IXICA Communications Inc. | In Service | Guelph |
| 444 | IXICA Communications Inc. | In Service | Amherstburg |
| 448 | IXICA Communications Inc. | In Service | McGregor |
| 480 | Iristel Inc. | In Service | Kitchener-Waterloo |
| 481 | Iristel Inc. | In Service | Kitchener-Waterloo |
| 482 | Iristel Inc. | In Service | London |
| 483 | Iristel Inc. | In Service | Kitchener-Waterloo |
| 484 | Iristel Inc. | In Service | Kitchener-Waterloo |
| 485 | Iristel Inc. | In Service | London |
| 486 | Iristel Inc. | In Service | London |
| 488 | Iristel Inc. | In Service | London |
| 489 | Iristel Inc. | In Service | London |
| 490 | Iristel Inc. | In Service | Kitchener-Waterloo |
| 499 | IXICA Communications Inc. | In Service | Woodslee |
| 500 | IXICA Communications Inc. | In Service | Kingsville |
| 522 | Rogers Communications Canada Inc. (Cable) | In Service | Elora |
| 531 | Fibernetics Corporation | In Service | Fingal |
| 532 | Fibernetics Corporation | In Service | Dutton |
| 533 | Rogers Communications Canada Inc. (Wireless) | In Service | Mount Forest |
| 534 | Fibernetics Corporation | In Service | Port Stanley |
| 535 | Fibernetics Corporation | In Service | Rodney |
| 536 | Fibernetics Corporation | In Service | Shedden |
| 537 | Fibernetics Corporation | In Service | Sparta |
| 538 | Fibernetics Corporation | In Service | St. Thomas |
| 539 | Fibernetics Corporation | In Service | West Lorne |
| 550 | Rogers Communications Canada Inc. (Wireless) | In Service | Listowel |
| 551 | Rogers Communications Canada Inc. (Wireless) | In Service | Listowel |
| 552 | Rogers Communications Canada Inc. (Wireless) | In Service | Listowel |
| 553 | Rogers Communications Canada Inc. (Wireless) | In Service | Listowel |
| 556 | Rogers Communications Canada Inc. (Wireless) | In Service | Listowel |
| 558 | Rogers Communications Canada Inc. | In Service | Galt |
| 559 | Fibernetics Corporation | In Service | Simcoe |
| 560 | Fibernetics Corporation | In Service | Stratford |
| 561 | Fibernetics Corporation | In Service | Amherstburg |
| 562 | Fibernetics Corporation | In Service | Essex |
| 563 | Fibernetics Corporation | In Service | Kingsville |
| 564 | Fibernetics Corporation | In Service | Leamington |
| 565 | Fibernetics Corporation | In Service | Tecumseh |
| 566 | Fibernetics Corporation | In Service | Glencoe |
| 567 | Fibernetics Corporation | In Service | Lambeth |
| 568 | Fibernetics Corporation | In Service | Parkhill |
| 569 | Fibernetics Corporation | In Service | Auburn |
| 570 | Fibernetics Corporation | In Service | Blyth |
| 571 | Fibernetics Corporation | In Service | Brussels |
| 572 | Fibernetics Corporation | In Service | Hensall |
| 573 | Fibernetics Corporation | In Service | Lucknow |
| 574 | Fibernetics Corporation | In Service | Seaforth |
| 575 | Fibernetics Corporation | In Service | Wingham |
| 585 | Rogers Communications Canada Inc. | In Service | Stratford |
| 588 | Rogers Communications Canada Inc. (Wireless) | In Service | London |
| 599 | IXICA Communications Inc. | In Service | Wheatley |
| 600 | IXICA Communications Inc. | In Service | Harrow |
| 622 | Rogers Communications Canada Inc. (Cable) | In Service | Grand Valley |
| 633 | Rogers Communications Canada Inc. (Wireless) | In Service | Mount Forest |
| 659 | ISP Telecom | In Service | Crediton |
| 666 | IXICA Communications Inc. | In Service | Tecumseh |
| 668 | Rogers Communications Canada Inc. | In Service | Hespeler |
| 686 | Rogers Communications Canada Inc. | In Service | Tavistock |
| 688 | Rogers Communications Canada Inc. (Cable) | In Service | London |
| 689 | Rogers Communications Canada Inc. (Cable) | In Service | London |
| 690 | Rogers Communications Canada Inc. (Cable) | In Service | London |
| 699 | IXICA Communications Inc. | In Service | Pleasant Park |
| 700 | IXICA Communications Inc. | In Service | Leamington |
| 722 | Rogers Communications Canada Inc. (Cable) | In Service | Waterford |
| 733 | Rogers Communications Canada Inc. (Wireless) | In Service | Mount Forest |
| 770 | Distributel | In Service | Woodslee |
| 771 | Distributel | In Service | Stoney Point |
| 772 | Distributel | In Service | Essex |
| 773 | Distributel | In Service | Harrow |
| 774 | Distributel | In Service | Maidstone |
| 775 | Distributel | In Service | Amherstburg |
| 776 | Distributel | In Service | Tecumseh |
| 777 | Distributel | In Service | La Salle |
| 778 | Distributel | In Service | Kingsville |
| 779 | Distributel | In Service | Belle River |
| 780 | Distributel | In Service | Emeryville |
| 781 | Distributel | In Service | McGregor |
| 782 | Distributel | In Service | Pleasant Park |
| 783 | Distributel | In Service | Comber |
| 784 | Distributel | In Service | Leamington |
| 785 | Distributel | In Service | Pelee Island |
| 786 | Distributel | In Service | Wheatley |
| 787 | Rogers Communications Canada Inc. | In Service | Thornbury |
| 788 | Rogers Communications Canada Inc. (Wireless) | In Service | London |
| 799 | IXICA Communications Inc. | In Service | Pelee Island |
| 800 | Iristel Inc. | In Service | Brantford |
| 808 | IXICA Communications Inc. | In Service | Guelph |
| 822 | Rogers Communications Canada Inc. | In Service | Ayr |
| 825 | ISP Telecom | In Service | Acton |
| 826 | ISP Telecom | In Service | Rockwood |
| 833 | Rogers Communications Canada Inc. | In Service | Breslau |
| 855 | Rogers Communications Canada Inc. | In Service | Guelph |
| 857 | ISP Telecom | In Service | Kingsville |
| 858 | ISP Telecom | In Service | Exeter |
| 859 | ISP Telecom | In Service | Strathroy |
| 866 | Rogers Communications Canada Inc. | In Service | London |
| 867 | ISP Telecom | In Service | Ayr |
| 868 | ISP Telecom | In Service | Breslau |
| 869 | ISP Telecom | In Service | Baden |
| 870 | ISP Telecom | In Service | St. Clements |
| 871 | ISP Telecom | In Service | Linwood |
| 872 | ISP Telecom | In Service | Elmira |
| 875 | ISP Telecom | In Service | Leamington |
| 876 | ISP Telecom | In Service | Tecumseh |
| 877 | Rogers Communications Canada Inc. | In Service | Owen Sound |
| 878 | ISP Telecom | In Service | Wallaceburg |
| 879 | ISP Telecom | In Service | Caledon |
| 880 | Rogers Communications Canada Inc. (Cable) | In Service | Brantford |
| 881 | Fido Solutions Inc. | In Service | London |
| 882 | Rogers Communications Canada Inc. (Wireless) | In Service | Brantford |
| 883 | Rogers Communications Canada Inc. (Wireless) | In Service | Kitchener-Waterloo |
| 884 | IXICA Communications Inc. | In Service | Maidstone |
| 885 | Rogers Communications Canada Inc. (Wireless) | In Service | Brantford |
| 886 | Rogers Communications Canada Inc. (Wireless) | In Service | Chatham |
| 887 | Rogers Communications Canada Inc. (Wireless) | In Service | Woodstock |
| 888 | Rogers Communications Canada Inc. (Wireless) | In Service | London |
| 889 | Rogers Communications Canada Inc. | In Service | Kitchener-Waterloo |
| 892 | ISP Telecom | In Service | Blenheim |
| 893 | ISP Telecom | In Service | Tilbury |
| 898 | TELUS Integrated Communications | In Service | Kitchener-Waterloo |
| 899 | Rogers Communications Canada Inc. | In Service | Paris |
| 900 | Iristel Inc. | In Service | Brantford |
| 980 | Rogers Communications Canada Inc. (Cable) | In Service | Goderich |
| 988 | Rogers Communications Canada Inc. (Cable) | In Service | Guelph |
| 989 | TELUS Mobility | In Service | Guelph |
| 990 | TELUS Mobility | In Service | Kitchener-Waterloo |
| 991 | TELUS Mobility | In Service | London |
| 992 | TELUS Mobility | In Service | Stratford |
| 993 | TELUS Mobility | In Service | Windsor |
| 994 | TELUS Mobility | In Service | Kitchener-Waterloo |
| 995 | TELUS Mobility | In Service | Sarnia |
| 996 | TELUS Mobility | In Service | Chatham |
| 997 | TELUS Mobility | In Service | Sarnia |
| 998 | TELUS Mobility | In Service | Tillsonburg |
| 999 | TELUS Mobility | In Service | Brantford |
| 310 | | Moratorium on Assignment | |
| 610 | | Moratorium on Assignment | |
| 810 | | Moratorium on Assignment | |
| 226 | | Not Available | |
| 382 | | Not Available | |
| 460 | | Not Available | |
| 487 | | Not Available | |
| 519 | | Not Available | |
| 548 | | Not Available | |
| 958 | | Plant Test | |
| 959 | | Plant Test | |
63.2% of the exchanges in this area code are still available.