Phone prefixes in Lethbridge, AB

In numbers

In-service prefixes

58

Telephone numbers covered

580,000

Carriers

13

Area codes

4

Provinces and territories

1

First assignment

August 15, 2000

Most recent assignment

December 16, 2025

Lethbridge’s share of its area codes

Within area code 403, Lethbridge accounts for only 32 of 781 prefixes (4.1%): the code is dominated by Calgary and spread over 142 rate centres. Within area code 587, Lethbridge accounts for only 15 of 779 prefixes (1.9%): the code is dominated by Calgary and spread over 137 rate centres. Within area code 825, Lethbridge accounts for only 10 of 769 prefixes (1.3%): the code is dominated by Calgary and spread over 301 rate centres. Within area code 368, Lethbridge accounts for only 1 of 78 prefixes (1.3%): the code is dominated by Calgary and spread over 10 rate centres.

Who holds these numbers

TELUS holds the largest share at 18 prefixes, 31.0% of the total, ahead of 12 other carriers. Code by code: in 403, TELUS leads with 16 of 32 prefixes ahead of 7 others; in 587, Iristel Inc. leads with 3 of 15 prefixes ahead of 9 others; in 825, Iristel Inc. leads with 3 of 10 prefixes ahead of 5 others; Rogers Communications Canada Inc. (Wireless) is the only holder in 368. No carrier holds prefixes in every one of Lethbridge’s 4 area codes, while 4 appear in just one.

Wireless and wireline

21 of Lethbridge’s 58 prefixes (36.2%) are held by carriers whose registered name marks a wireless business: TELUS Mobility, Bell Mobility, Rogers Communications Canada Inc. (Wireless) and Fido Solutions Inc. Wireline prefixes still outnumber them, carried by TELUS, Iristel Inc, Bell West Inc and Videotron Ltd. 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

Lethbridge’s dated assignments run from 2000 to 2025. The busiest period was 2015–2019, when 12 prefixes went to 9 carriers. 15 prefixes (26%) carry no date in the register: these are the historic pre-1999 assignments, the wireline bedrock of the rate centre. Since 2020 another 7 prefixes have been added, so the rate centre is still growing.

Lethbridge’s oldest prefixes, the ones the register leaves undated, belong to TELUS, Rogers Communications Canada Inc. (Wireless) and TELUS Mobility: these carriers made up the landscape before competition arrived. The first dated assignment went to TELUS Mobility in 2000. The most recent arrivals are Videotron Ltd. (2018), Rogers Communications Canada Inc. (Cable) (2017) and Comwave Networks (2014), a sign that new carriers are still asking for numbers in Lethbridge.

Lethbridge’s 58 prefixes provide 580,000 numbers, which corresponds to a mid-sized city or a well-established suburb that every major carrier wants a slice of.

No single carrier dominates Lethbridge: the leader, TELUS, holds only 31.0% of the prefixes against 12 competitors, a sign of a highly fragmented market where cable companies, mobility brands and VoIP providers weigh as much as the incumbent.

Allocation is mature: only 16.3% of the dated prefixes are less than ten years old, most having been handed out in 2015–2019, and 15 prefixes go back to the undated monopoly era. New Lethbridge numbers mostly come out of blocks that were assigned long ago.

The register also shows 1 prefix assigned but not yet in service in Lethbridge (Fibernetics Corporation): numbers that will start showing up on call displays in the coming months.

15 undated in the register.

Dialling a Lethbridge number

Lethbridge 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

Lethbridge shares area codes 403, 587, 825 and 368 with at least 20 other rate centres, including Calgary, Edmonton, Red Deer, Medicine Hat, Fort McMurray, Banff, High River and Canmore. The largest of them, Calgary, holds 756 prefixes in 368, 403, 587 and 825; the smallest on the list, Fox Creek, has just 14.

What a Lethbridge number tells you

A number attached to Lethbridge 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 13 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 Lethbridge: code 403-308 is recorded for TELUS, so every 403-308-XXXX number (10,000 possible) descends from that assignment. “Lethbridge, Alberta” there names a rate centre, not a municipality, and several area codes overlay it.

Every Lethbridge prefix

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

Allocated prefixes

All 58 in-service prefixes, grouped by rate centre.

Elsewhere in Alberta