Phone prefixes in Calgary, AB

In numbers

In-service prefixes

756

Telephone numbers covered

7,560,000

Carriers

21

Area codes

4

Provinces and territories

1

First assignment

August 30, 1999

Most recent assignment

December 22, 2025

Calgary’s share of its area codes

Within area code 403, Calgary takes 370 of 781 prefixes (47.4%), a substantial slice of a code shared by 142 rate centres, the largest of them Calgary. Within area code 587, Calgary takes 195 of 779 prefixes (25.0%), a substantial slice of a code shared by 137 rate centres, the largest of them Calgary. Within area code 825, Calgary takes 146 of 769 prefixes (19.0%), a substantial slice of a code shared by 301 rate centres, the largest of them Calgary. Calgary dominates area code 368: 45 of its 78 in-service prefixes, 57.7%, are attached to this rate centre, leaving the remainder to 9 other rate centres.

Who holds these numbers

TELUS holds the largest share at 222 prefixes, 29.4% of the total, ahead of 20 other carriers. Code by code: in 403, TELUS leads with 176 of 370 prefixes ahead of 17 others; in 587, Bell Mobility leads with 45 of 195 prefixes ahead of 15 others; in 825, Bell Mobility leads with 55 of 146 prefixes ahead of 14 others; in 368, Rogers Communications Canada Inc. (Wireless) leads with 19 of 45 prefixes ahead of 4 others. 5 carriers hold prefixes in every one of Calgary’s 4 area codes, while 6 appear in just one.

Wireless and wireline

351 of Calgary’s 756 prefixes (46.4%) are held by carriers whose registered name marks a wireless business: Bell Mobility, TELUS Mobility, Rogers Communications Canada Inc. (Wireless) and Fido Solutions Inc. Wireline prefixes still outnumber them, carried by TELUS, Iristel Inc, Videotron Ltd and Shaw Telecom Inc. This is a sort by name, not a licence lookup, and a mobile prefix may have been ported to another network since.

How the allocation was built up

Calgary’s dated assignments run from 1999 to 2025. The busiest period was 2010–2014, when 140 prefixes went to 14 carriers. 179 prefixes (24%) carry no date in the register: these are the historic pre-1999 assignments, the wireline bedrock of the rate centre. Since 2020 another 138 prefixes have been added, so the rate centre is still growing.

Calgary’s oldest prefixes, the ones the register leaves undated, belong to TELUS, TELUS Mobility and Rogers Communications Canada Inc. (Wireless): 9 carriers made up the landscape before competition arrived. The first dated assignment went to Fido Solutions Inc. in 1999. The most recent arrivals are Bragg Communications Inc. (2024), Beanfield Technologies Inc. (2020) and IXICA Communications Inc. (2018), a sign that new carriers are still asking for numbers in Calgary.

With 756 prefixes, Calgary has a theoretical pool of 7,560,000 numbers: metropolitan-scale capacity, where running out of free combinations is the very reason overlay area codes exist.

No single carrier dominates Calgary: the leader, TELUS, holds only 29.4% of the prefixes against 20 competitors, a sign of a highly fragmented market where cable companies, mobility brands and VoIP providers weigh as much as the incumbent.

Demand remains steady: 23.9% of the dated prefixes go back to the last ten years, the most active period being 2010–2014. The rate centre is growing at a regular rather than explosive pace.

The register also shows 6 prefixes assigned but not yet in service in Calgary (Bell Mobility, TELUS Mobility and Videotron Ltd): numbers that will start showing up on call displays in the coming months.

179 undated in the register.

Dialling a Calgary number

Calgary is served by 4 overlaid area codes (403, 587, 825 and 368). A 368 number is no more “out of town” than a 403 one; from abroad, dial +1 and the full ten digits.

The numbering neighbourhood

Calgary shares area codes 403, 587, 825 and 368 with at least 20 other rate centres, including Edmonton, Red Deer, Lethbridge, Medicine Hat, Fort McMurray, Banff, High River and Canmore. The largest of them, Edmonton, holds 230 prefixes in 368, 587 and 825; the smallest on the list, Fox Creek, has just 14.

What a Calgary number tells you

A number attached to Calgary tells you that its prefix was issued to a carrier for this rate centre in Alberta, most often TELUS. It does not tell you where the handset is today: a subscriber may have ported the number to any of the 21 carriers present here or to a VoIP service usable anywhere. Nor does it tell you who is calling: caller ID can be spoofed, and an Alberta area code is easy to borrow to look local.

Reading a register entry for Calgary: code 403-201 is recorded for TELUS, so every 403-201-XXXX number (10,000 possible) descends from that assignment. “Calgary, Alberta” there names a rate centre, not a municipality, and several area codes overlay it.

Every Calgary prefix

Each row is an in-service central-office code recorded for Calgary, with its original holder and year of assignment.

Allocated prefixes

Showing 400 of 756 prefixes, largest rate centres first.

Elsewhere in Alberta