Phone prefixes in Otter Lake, ON

In numbers

In-service prefixes

4

Telephone numbers covered

40,000

Carriers

4

Area codes

3

Provinces and territories

1

First assignment

January 25, 2013

Most recent assignment

August 21, 2025

Otter Lake’s share of its area codes

Within area code 249, Otter Lake accounts for only 2 of 585 prefixes (0.3%): the code is dominated by Sudbury and spread over 176 rate centres. Within area code 683, Otter Lake accounts for only 1 of 80 prefixes (1.3%): the code is dominated by Lindsay and spread over 57 rate centres. Within area code 705, Otter Lake accounts for only 1 of 770 prefixes (0.1%): the code is dominated by Barrie and spread over 203 rate centres.

Who holds these numbers

Bell Canada holds the largest share at 1 prefixes, 25.0% of the total, ahead of 3 other carriers. Code by code: in 249, Fibernetics Corporation leads with 1 of 2 prefixes ahead of 1 others; Cogeco Connexion Inc. is the only holder in 683; Bell Canada is the only holder in 705. No carrier holds prefixes in every one of Otter Lake’s 3 area codes, while 4 appear in just one.

Wireless and wireline

None of Otter Lake’s holders carries a mobility brand in its registered name: all 4 prefixes belong to wireline or wholesale carriers, among them Bell Canada, Cogeco Connexion Inc, Fibernetics Corporation and TELUS Integrated Communications. A call showing a Otter Lake number therefore nominally comes from a landline, cable or VoIP platform rather than a locally assigned cellphone.

How the allocation was built up

Otter Lake’s dated assignments run from 2013 to 2025. The busiest period was 2010–2014, when 1 prefixes went to 1 carrier. 1 prefixes (25%) carry no date in the register: these are the historic pre-1999 assignments, the wireline bedrock of the rate centre. Since 2020 another 2 prefixes have been added, so the rate centre is still growing.

Otter Lake’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 2013. The most recent arrivals are Cogeco Connexion Inc. (2025), Fibernetics Corporation (2021) and TELUS Integrated Communications (2013), a sign that new carriers are still asking for numbers in Otter Lake.

Otter Lake has just 4 prefixes (40,000 numbers): a very small rate centre, typical of a village or rural area served by a single switching office.

No single carrier dominates Otter Lake: the leader, Bell Canada, holds only 25.0% of the prefixes against 3 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: 66.7% of the dated prefixes were assigned in the last ten years, peaking in 2010–2014. Otter Lake is among the rate centres where demand for numbers is still rising quickly.

1 undated in the register.

Dialling a Otter Lake number

Otter Lake is served by 3 overlaid area codes (249, 683 and 705). A 705 number is no more “out of town” than a 249 one; from abroad, dial +1 and the full ten digits.

The numbering neighbourhood

Otter Lake shares area codes 249, 683 and 705 with at least 20 other rate centres, including Barrie, Sudbury, Peterborough, Sault Ste. Marie, North Bay, Huntsville, Lindsay and Collingwood. The largest of them, Barrie, holds 95 prefixes in 249, 683 and 705; the smallest on the list, Kapuskasing, has just 12.

What a Otter Lake number tells you

A number attached to Otter Lake tells you that its prefix was issued to a carrier for this rate centre in Ontario, most often Bell Canada. It does not tell you where the handset is today: a subscriber may have ported the number to any of the 4 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 Otter Lake: code 705-378 is recorded for Bell Canada, so every 705-378-XXXX number (10,000 possible) descends from that assignment. “Otter Lake, Ontario” there names a rate centre, not a municipality, and several area codes overlay it.

Every Otter Lake prefix

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

Had a call from a Otter Lake 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 4 in-service prefixes, grouped by rate centre.

Elsewhere in Ontario