Phone prefixes in Essex, ON

In numbers

In-service prefixes

16

Telephone numbers covered

160,000

Carriers

10

Area codes

3

Provinces and territories

1

First assignment

February 22, 2006

Most recent assignment

September 18, 2024

Essex’s share of its area codes

Within area code 548, Essex accounts for only 8 of 499 prefixes (1.6%): the code is dominated by London and spread over 170 rate centres. Within area code 226, Essex accounts for only 6 of 778 prefixes (0.8%): the code is dominated by London and spread over 166 rate centres. Within area code 519, Essex accounts for only 2 of 779 prefixes (0.3%): the code is dominated by London and spread over 210 rate centres.

Who holds these numbers

Iristel Inc. holds the largest share at 6 prefixes, 37.5% of the total, ahead of 9 other carriers. Code by code: in 548, Iristel Inc. leads with 3 of 8 prefixes ahead of 4 others; in 226, Iristel Inc. leads with 3 of 6 prefixes ahead of 3 others; in 519, Bell Canada leads with 1 of 2 prefixes ahead of 1 others. No carrier holds prefixes in every one of Essex’s 3 area codes, while 9 appear in just one.

Wireless and wireline

None of Essex’s holders carries a mobility brand in its registered name: all 16 prefixes belong to wireline or wholesale carriers, among them Iristel Inc, Fibernetics Corporation, Bell Canada and Distributel. A call showing a Essex number therefore nominally comes from a landline, cable or VoIP platform rather than a locally assigned cellphone.

How the allocation was built up

Essex’s dated assignments run from 2006 to 2024. The busiest period was 2020–2024, when 8 prefixes went to 5 carriers. 1 prefixes (6%) carry no date in the register: these are the historic pre-1999 assignments, the wireline bedrock of the rate centre. Since 2020 another 8 prefixes have been added, so the rate centre is still growing.

Essex’s oldest prefixes, the ones the register leaves undated, belong to Bell Canada: this carrier made up the landscape before competition arrived. The first dated assignment went to TELUS Integrated Communications in 2006. The most recent arrivals are Gosfield North Communication Co-operative Ltd. (2022), IXICA Communications Inc. (2021) and Fibernetics Corporation (2020), a sign that new carriers are still asking for numbers in Essex.

Essex has only 16 prefixes, or 160,000 numbers: a small rate centre, where the arrival of a single new carrier visibly changes the landscape.

No single carrier dominates Essex: the leader, Iristel Inc., holds only 37.5% of the prefixes against 9 competitors, a sign of a highly fragmented market where cable companies, mobility brands and VoIP providers weigh as much as the incumbent.

Growth is recent: 53.3% of the dated prefixes were assigned in the last ten years, peaking in 2020–2024. Essex is among the rate centres where demand for numbers is still rising quickly.

The register also shows 1 prefix assigned but not yet in service in Essex (Managed Network Systems Inc): numbers that will start showing up on call displays in the coming months.

1 undated in the register.

Dialling a Essex number

Essex is served by 3 overlaid area codes (548, 226 and 519). A 519 number is no more “out of town” than a 548 one; from abroad, dial +1 and the full ten digits.

The numbering neighbourhood

Essex shares area codes 548, 226 and 519 with at least 20 other rate centres, including London, Kitchener-Waterloo, Windsor, Guelph, Brantford, Sarnia, Chatham and Hespeler. The largest of them, London, holds 214 prefixes in 226, 519 and 548; the smallest on the list, St. Thomas, has just 15.

What a Essex number tells you

A number attached to Essex tells you that its prefix was issued to a carrier for this rate centre in Ontario, most often Iristel Inc.. It does not tell you where the handset is today: a subscriber may have ported the number to any of the 10 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 Essex: code 548-406 is recorded for Iristel Inc., so every 548-406-XXXX number (10,000 possible) descends from that assignment. “Essex, Ontario” there names a rate centre, not a municipality, and several area codes overlay it.

Every Essex prefix

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

Had a call from a Essex number?

No clear pattern in reports on these numbers yet. If a call worried you:

1. 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.

2. 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.

   Report to the Canadian Anti-Fraud Centre ↗

3. 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.

   National Do Not Call List ↗Who can still call you ↗

4. 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.

   Get Cyber Safe: forwarding to 7726 ↗

Allocated prefixes

All 16 in-service prefixes, grouped by rate centre.

Elsewhere in Ontario