Area code 403
Area code 403 holds 781 in-service central-office prefixes in the CNAC register, covering roughly 7,810,000 telephone numbers. They are split between 19 carriers and 142 rate centres. The largest is Calgary. Recorded assignments run from August 30, 1999 to October 15, 2019. That ranks it 2 of 55 Canadian area codes by prefix count.
Background reading: Caller ID spoofing, STIR/SHAKEN, and how to actually block calls in Canada · Canadian area codes, overlays, and what a 416 number actually tells you · One-ring scams and the Caribbean area codes that look Canadian
Area code 403 at a glance
- Province or territory
- Alberta
- Main rate centres
- Calgary, Red Deer, Lethbridge, Medicine Hat, Canmore
- Local time
- — Mountain Time (MT), UTC−7; UTC−6 in daylight saving time
- In service since
- 1947
- Number format
- 403-NXX-XXXX · +1 403 NXX XXXX
Sources: CNAC, NANPA (September 25, 2026), Statistics Canada.
In numbers
- In-service prefixes
- 781
- Telephone numbers covered
- 7,810,000
- Carriers
- 19
- Rate centres
- 142
- Provinces and territories
- 1
- First assignment
- August 30, 1999
- Most recent assignment
- October 15, 2019
Who holds these numbers
TELUS holds the largest share at 401 prefixes, 51.3% of the total, ahead of 18 other carriers.
| Carrier | Prefixes | Share | First assigned |
|---|---|---|---|
| TELUS | 401 | 51.3 % | 1999 |
| TELUS Mobility | 95 | 12.2 % | 1999 |
| Rogers Communications Canada Inc. (Wireless) | 71 | 9.1 % | 1999 |
| Bell Mobility | 64 | 8.2 % | 2001 |
| Shaw Telecom Inc. | 59 | 7.6 % | 2006 |
| Bell West Inc. | 22 | 2.8 % | 1999 |
| Fido Solutions Inc. | 21 | 2.7 % | 1999 |
| Distributel | 9 | 1.2 % | 2010 |
| Rogers Communications Canada Inc. (Cable) | 9 | 1.2 % | 2000 |
| Zayo Canada Inc. | 8 | 1.0 % | 1999 |
| GT Group Telecom Services Corp. | 5 | 0.6 % | 1999 |
| Globalstar | 4 | 0.5 % | 2003 |
| ISP Telecom Inc. | 4 | 0.5 % | 2006 |
| Bragg Communications Inc. | 3 | 0.4 % | 2009 |
| Videotron Ltd. | 2 | 0.3 % | 2009 |
| Fibernetics Corporation | 1 | 0.1 % | 2009 |
| IXICA Communications Inc. | 1 | 0.1 % | 2019 |
| Iristel Inc. | 1 | 0.1 % | 2008 |
| Primus Telecommunications Canada Inc. | 1 | 0.1 % | 2004 |
Where these numbers land
Prefixes in 403 serve 142 rate centres. A rate centre is the billing area a prefix is attached to, not where the handset is.
| Rate centre | Province | Prefixes | Carriers |
|---|---|---|---|
| Calgary | AB | 370 | 18 |
| Red Deer | AB | 40 | 8 |
| Lethbridge | AB | 32 | 8 |
| Medicine Hat | AB | 23 | 8 |
| Canmore | AB | 11 | 8 |
| High River | AB | 11 | 8 |
| Strathmore | AB | 11 | 6 |
| Brooks | AB | 10 | 5 |
| Banff | AB | 9 | 7 |
| Crowsnest Pass | AB | 9 | 5 |
| Olds | AB | 9 | 6 |
| Rocky Mountain House | AB | 9 | 5 |
| Airdrie | AB | 8 | 5 |
| Drumheller | AB | 8 | 5 |
| Pincher Creek | AB | 8 | 6 |
| Cochrane | AB | 7 | 5 |
| Okotoks | AB | 7 | 5 |
| Stettler | AB | 7 | 4 |
| Claresholm | AB | 6 | 4 |
| Ponoka | AB | 6 | 4 |
| Three Hills | AB | 5 | 4 |
| Hanna | AB | 4 | 3 |
| Milk River | AB | 4 | 3 |
| Sundre | AB | 4 | 3 |
| Vauxhall | AB | 4 | 4 |
| Veteran | AB | 4 | 3 |
| Vulcan | AB | 4 | 3 |
| Bowden | AB | 3 | 3 |
| Cardston | AB | 3 | 3 |
| Coronation | AB | 3 | 3 |
| Didsbury | AB | 3 | 3 |
| Lacombe | AB | 3 | 2 |
| Oyen | AB | 3 | 3 |
| Sylvan Lake | AB | 3 | 2 |
| Bentley | AB | 2 | 2 |
| Blackfalds | AB | 2 | 2 |
| Bow Island | AB | 2 | 2 |
| Carstairs | AB | 2 | 2 |
| Coaldale | AB | 2 | 2 |
| Consort | AB | 2 | 2 |
| Cowley | AB | 2 | 2 |
| Crossfield | AB | 2 | 2 |
| Exshaw | AB | 2 | 2 |
| Fort Macleod | AB | 2 | 2 |
| Granum | AB | 2 | 2 |
| Innisfail | AB | 2 | 2 |
| Lake Louise | AB | 2 | 2 |
| Langdon | AB | 2 | 2 |
| Magrath | AB | 2 | 2 |
| Penhold | AB | 2 | 2 |
| Picture Butte | AB | 2 | 2 |
| Ralston | AB | 2 | 2 |
| Taber | AB | 2 | 2 |
| Trochu | AB | 2 | 2 |
| Warner | AB | 2 | 2 |
| Acadia Valley | AB | 1 | 1 |
| Acme | AB | 1 | 1 |
| Alix | AB | 1 | 1 |
| Altario | AB | 1 | 1 |
| Arrowwood | AB | 1 | 1 |
| Barons | AB | 1 | 1 |
| Bassano | AB | 1 | 1 |
| Beiseker | AB | 1 | 1 |
| Big Valley | AB | 1 | 1 |
| Bindloss | AB | 1 | 1 |
| Blackie | AB | 1 | 1 |
| Bragg Creek | AB | 1 | 1 |
| Brocket | AB | 1 | 1 |
| Burdett | AB | 1 | 1 |
| Byemoor | AB | 1 | 1 |
| Carbon | AB | 1 | 1 |
| Carmangay | AB | 1 | 1 |
| Caroline | AB | 1 | 1 |
| Castor | AB | 1 | 1 |
| Cayley | AB | 1 | 1 |
| Cereal | AB | 1 | 1 |
| Cessford | AB | 1 | 1 |
| Champion | AB | 1 | 1 |
| Clive | AB | 1 | 1 |
| Coutts | AB | 1 | 1 |
How the allocation was built up
| Period | Prefixes | Carriers |
|---|---|---|
| 1995–1999 | 9 | 7 |
| 2000–2004 | 141 | 10 |
| 2005–2009 | 227 | 16 |
| 2010–2014 | 19 | 4 |
| 2015–2019 | 1 | 1 |
384 undated in the register.
Overlay area codes
403 shares its rate centres with 825, 587, 368. Overlay codes cover the same ground, which is why ten-digit dialling is required: two neighbours on one street can hold different area codes.
What people check and report about 403 numbers
Searches typed into this site's lookup form since July 28, 2026, plus the verdicts and moderated reports visitors left. A search usually follows a missed call.
- Checks
- 282
- Different numbers
- 277
- Different people
- 250
12 verdicts and 1 report
Scam 50 % (6) · Nuisance 17 % (2) · Safe 33 % (4)
Report types: Scam (1).
Phone and text fraud in Alberta
In 2024 the Canadian Anti-Fraud Centre received 1,458 fraud reports from Alberta where the first contact was a phone call (1,056) or a text (402); 842 came from victims, who reported $11.7 million lost. The most common types were service, bank investigator, phishing.
January to September 2025: 910 reports (-12% on the same months of 2024) and $16 million reported lost (+69%).
Source: Canadian Anti-Fraud Centre open data (Open Government Licence – Canada), current to September 29, 2025. These are province-wide figures, not specific to one area code, and only a fraction of fraud is ever reported. Dataset
Had a call from a 403 number?
No clear pattern in reports on these numbers yet. If a call worried you:
- Call back on a number you trust
If a caller says they are your bank, the Canada Revenue Agency, a courier or your phone company, hang up and call the organization on the number from its website or your statement, never the number that called you. Caller ID can be faked.
- Report the fraud
Report the call or text to the Canadian Anti-Fraud Centre online or at 1-888-495-8501. If you lost money or gave out personal details, tell your bank first, then your local police.
- Register on the National Do Not Call List
Registering a landline or mobile on the National DNCL is free. Registered charities, political parties, newspapers and companies you already do business with may still call.
- Forward suspicious texts to 7726
Forward a scam or spam text to 7726 (SPAM on the keypad). It's free, and your carrier uses it to block the sender. Don't tap links or reply.
Area code 403: questions and answers
Where is area code 403?
403 serves Alberta. Its 781 in-service prefixes belong to 142 rate centres, mainly Calgary, Red Deer, Lethbridge and Medicine Hat.
What time zone is area code 403 in?
Every placed rate centre in 403 is on Mountain Time (MT, UTC−7), with daylight saving time (UTC−6) from the second Sunday in March to the first Sunday in November.
When did area code 403 start?
403 has been in service since 1947. It shares its territory with 368, 587 and 825, so a new number there can get any of these codes.
Which carriers hold 403 numbers?
The CNAC register lists 19 carriers with prefixes in 403; the largest are TELUS (51.3%), TELUS Mobility (12.2%) and Rogers Communications Canada Inc. (Wireless) (9.1%). Numbers can be ported, so the original carrier may not be the current one.
Are calls from 403 numbers scams?
Visitors have left 12 verdicts on 403 numbers (6 scam, 2 nuisance, 4 safe) and 1 moderated reports. That covers the numbers people looked up, not all of 403: most belong to ordinary households and businesses, and scammers can display a local number.
Is phone fraud rising in Alberta?
In the Canadian Anti-Fraud Centre's open data, call and text fraud reports from Alberta went from 1,037 in January–September 2024 to 910 in the same months of 2025 (-12%). Reported losses went from $9.4 million to $16 million.
How do I report a scam call from a 403 number?
Report it to the Canadian Anti-Fraud Centre (1-888-495-8501). If you lost money, call your bank first, then your local police. Unwanted telemarketing goes to the National Do Not Call List, and spam texts can be forwarded to 7726.
Allocated prefixes
Showing 235 of 781 prefixes, largest rate centres first.
Calgary, AB
403-200 · 403-201 · 403-202 · 403-203 · 403-204 · 403-205 · 403-206 · 403-207 · 403-208 · 403-209
Red Deer, AB
403-302 · 403-304 · 403-307 · 403-309 · 403-314 · 403-318 · 403-340 · 403-341 · 403-342 · 403-343
Lethbridge, AB
403-308 · 403-315 · 403-317 · 403-320 · 403-327 · 403-328 · 403-329 · 403-330 · 403-331 · 403-332
Medicine Hat, AB
403-458 · 403-487 · 403-488 · 403-502 · 403-504 · 403-525 · 403-526 · 403-527 · 403-528 · 403-529
Canmore, AB
403-493 · 403-609 · 403-621 · 403-675 · 403-678 · 403-679 · 403-688 · 403-707 · 403-812 · 403-953
High River, AB
403-336 · 403-422 · 403-469 · 403-498 · 403-601 · 403-602 · 403-603 · 403-649 · 403-652 · 403-841
Strathmore, AB
403-324 · 403-325 · 403-361 · 403-480 · 403-499 · 403-814 · 403-901 · 403-902 · 403-934 · 403-962
Brooks, AB
403-362 · 403-363 · 403-376 · 403-409 · 403-427 · 403-501 · 403-633 · 403-793 · 403-794 · 403-925
Banff, AB
403-431 · 403-497 · 403-760 · 403-762 · 403-763 · 403-778 · 403-951 · 403-985 · 403-996
Crowsnest Pass, AB
403-372 · 403-459 · 403-562 · 403-563 · 403-564 · 403-582 · 403-583 · 403-623 · 403-753
Olds, AB
403-415 · 403-438 · 403-507 · 403-556 · 403-559 · 403-586 · 403-672 · 403-791 · 403-994
Rocky Mountain House, AB
403-322 · 403-418 · 403-429 · 403-844 · 403-845 · 403-846 · 403-847 · 403-871 · 403-895
Airdrie, AB
403-316 · 403-420 · 403-768 · 403-912 · 403-945 · 403-948 · 403-960 · 403-980
Drumheller, AB
403-321 · 403-334 · 403-436 · 403-494 · 403-820 · 403-821 · 403-823 · 403-856
Pincher Creek, AB
403-339 · 403-432 · 403-484 · 403-624 · 403-627 · 403-632 · 403-683 · 403-904
Cochrane, AB
403-709 · 403-840 · 403-851 · 403-855 · 403-907 · 403-932 · 403-981
Okotoks, AB
403-306 · 403-842 · 403-917 · 403-938 · 403-939 · 403-982 · 403-995
Stettler, AB
403-323 · 403-430 · 403-740 · 403-741 · 403-742 · 403-743 · 403-916
Claresholm, AB
403-468 · 403-489 · 403-490 · 403-625 · 403-682 · 403-706
Ponoka, AB
403-704 · 403-783 · 403-785 · 403-790 · 403-913 · 403-963
Three Hills, AB
403-412 · 403-425 · 403-443 · 403-445 · 403-924
Hanna, AB
403-435 · 403-495 · 403-854 · 403-857
Milk River, AB
403-482 · 403-491 · 403-492 · 403-647
Sundre, AB
403-419 · 403-426 · 403-636 · 403-638
Vauxhall, AB
403-424 · 403-551 · 403-622 · 403-654
Veteran, AB
403-417 · 403-575 · 403-576 · 403-853
Vulcan, AB
403-423 · 403-485 · 403-486 · 403-496
Bowden, AB
403-224 · 403-449 · 403-657
Cardston, AB
403-448 · 403-653 · 403-659
Coronation, AB
403-413 · 403-446 · 403-578
Didsbury, AB
403-335 · 403-439 · 403-518
Lacombe, AB
403-782 · 403-786 · 403-789
Oyen, AB
403-414 · 403-433 · 403-664
Sylvan Lake, AB
403-858 · 403-864 · 403-887
Bentley, AB
403-658 · 403-748
Blackfalds, AB
403-600 · 403-885
Bow Island, AB
403-545 · 403-584
Carstairs, AB
403-337 · 403-940
Coaldale, AB
403-345 · 403-405
Consort, AB
403-447 · 403-577
Allocation source: Canadian Numbering Administrator (CNAC), the registry that records which carrier a central-office code was originally issued to. An allocation says who was issued the prefix, not who serves the number today: numbers can be ported between carriers, and caller ID can be spoofed outright.