Phone prefixes in London, ON

In numbers

In-service prefixes

217

Telephone numbers covered

2,170,000

Carriers

23

Area codes

4

Provinces and territories

1

First assignment

October 21, 1999

Most recent assignment

December 16, 2025

London’s share of its area codes

Within area code 519, London takes 106 of 779 prefixes (13.6%), a substantial slice of a code shared by 210 rate centres, the largest of them London. Within area code 226, London accounts for only 72 of 778 prefixes (9.3%): the code is dominated by London and spread over 166 rate centres. Within area code 548, London accounts for only 36 of 499 prefixes (7.2%): the code is dominated by London and spread over 170 rate centres. Within area code 382, London accounts for only 3 of 60 prefixes (5.0%): the code is dominated by Kitchener-Waterloo and spread over 38 rate centres.

Who holds these numbers

Rogers Communications Canada Inc. (Wireless) holds the largest share at 51 prefixes, 23.5% of the total, ahead of 22 other carriers. Code by code: in 519, Bell Canada leads with 46 of 106 prefixes ahead of 12 others; in 226, Rogers Communications Canada Inc. (Wireless) leads with 21 of 72 prefixes ahead of 15 others; in 548, Rogers Communications Canada Inc. (Wireless) leads with 14 of 36 prefixes ahead of 10 others; in 382, Rogers Communications Canada Inc. (Wireless) leads with 2 of 3 prefixes ahead of 1 others. 2 carriers hold prefixes in every one of London’s 4 area codes, while 10 appear in just one.

Wireless and wireline

103 of London’s 217 prefixes (47.5%) are held by carriers whose registered name marks a wireless business: Rogers Communications Canada Inc. (Wireless), Bell Mobility, TELUS Mobility and Fido Solutions Inc. Wireline prefixes still outnumber them, carried by Bell Canada, Iristel Inc, Rogers Communications Canada Inc. (Cable) 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

London’s dated assignments run from 1999 to 2025. The busiest period was 2015–2019, when 42 prefixes went to 12 carriers. 63 prefixes (29%) carry no date in the register: these are the historic pre-1999 assignments, the wireline bedrock of the rate centre. Since 2020 another 15 prefixes have been added, so the rate centre is still growing.

London’s oldest prefixes, the ones the register leaves undated, belong to Bell Canada, Bell Mobility and Rogers Communications Canada Inc. (Wireless): 7 carriers made up the landscape before competition arrived. The first dated assignment went to Bell Mobility in 1999. The most recent arrivals are IXICA Communications Inc. (2023), TekSavvy Solutions Inc (2021) and Rogers Communications Canada Inc. (2019), a sign that new carriers are still asking for numbers in London.

Its 217 prefixes stand for 2,170,000 possible numbers: London is a large rate centre, the kind that hosts several switching offices and a sizeable business clientele.

No single carrier dominates London: the leader, Rogers Communications Canada Inc. (Wireless), holds only 23.5% of the prefixes against 22 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 9.7% of the dated prefixes are less than ten years old, most having been handed out in 2015–2019, and 63 prefixes go back to the undated monopoly era. New London numbers mostly come out of blocks that were assigned long ago.

The register also shows 3 prefixes assigned but not yet in service in London (Bell Mobility, Cogeco Connexion Inc and TELUS Mobility): numbers that will start showing up on call displays in the coming months.

63 undated in the register.

Dialling a London number

London is served by 4 overlaid area codes (519, 226, 548 and 382). A 382 number is no more “out of town” than a 519 one; from abroad, dial +1 and the full ten digits.

The numbering neighbourhood

London shares area codes 519, 226, 548 and 382 with at least 20 other rate centres, including Kitchener-Waterloo, Windsor, Guelph, Brantford, Chatham, Sarnia, Hespeler and Owen Sound. The largest of them, Kitchener-Waterloo, holds 164 prefixes in 226, 382, 519 and 548; the smallest on the list, St. Thomas, has just 15.

What a London number tells you

A number attached to London tells you that its prefix was issued to a carrier for this rate centre in Ontario, most often Rogers Communications Canada Inc. (Wireless). It does not tell you where the handset is today: a subscriber may have ported the number to any of the 23 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 Ontario area code is easy to borrow to look local.

Reading a register entry for London: code 519-200 is recorded for Rogers Communications Canada Inc. (Wireless), so every 519-200-XXXX number (10,000 possible) descends from that assignment. “London, Ontario” there names a rate centre, not a municipality, and several area codes overlay it.

Every London prefix

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

Allocated prefixes

All 217 in-service prefixes, grouped by rate centre.

Elsewhere in Ontario