Phone prefixes in Gravenhurst, ON

In numbers

In-service prefixes

11

Telephone numbers covered

110,000

Carriers

7

Area codes

3

Provinces and territories

1

First assignment

February 23, 2007

Most recent assignment

September 3, 2025

Gravenhurst’s share of its area codes

Within area code 705, Gravenhurst accounts for only 6 of 770 prefixes (0.8%): the code is dominated by Barrie and spread over 203 rate centres. Within area code 249, Gravenhurst accounts for only 4 of 585 prefixes (0.7%): the code is dominated by Sudbury and spread over 176 rate centres. Within area code 683, Gravenhurst accounts for only 1 of 80 prefixes (1.3%): the code is dominated by Lindsay and spread over 57 rate centres.

Who holds these numbers

Iristel Inc. holds the largest share at 3 prefixes, 27.3% of the total, ahead of 6 other carriers. Code by code: in 705, Iristel Inc. leads with 2 of 6 prefixes ahead of 3 others; in 249, Iristel Inc. leads with 1 of 4 prefixes ahead of 3 others; IXICA Communications Inc. is the only holder in 683. No carrier holds prefixes in every one of Gravenhurst’s 3 area codes, while 5 appear in just one.

Wireless and wireline

None of Gravenhurst’s holders carries a mobility brand in its registered name: all 11 prefixes belong to wireline or wholesale carriers, among them Iristel Inc, Bell Canada, Fibernetics Corporation and Comwave Networks. A call showing a Gravenhurst number therefore nominally comes from a landline, cable or VoIP platform rather than a locally assigned cellphone.

How the allocation was built up

Gravenhurst’s dated assignments run from 2007 to 2025. The busiest period was 2020–2024, when 4 prefixes went to 3 carriers. 2 prefixes (18%) carry no date in the register: these are the historic pre-1999 assignments, the wireline bedrock of the rate centre. Since 2020 another 5 prefixes have been added, so the rate centre is still growing.

Gravenhurst’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 2007. The most recent arrivals are IXICA Communications Inc. (2025), Distributel (2022) and Comwave Networks (2016), a sign that new carriers are still asking for numbers in Gravenhurst.

Gravenhurst has only 11 prefixes, or 110,000 numbers: a small rate centre, where the arrival of a single new carrier visibly changes the landscape.

No single carrier dominates Gravenhurst: the leader, Iristel Inc., holds only 27.3% of the prefixes against 6 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: 55.6% of the dated prefixes were assigned in the last ten years, peaking in 2020–2024. Gravenhurst is among the rate centres where demand for numbers is still rising quickly.

2 undated in the register.

Dialling a Gravenhurst number

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

The numbering neighbourhood

Gravenhurst shares area codes 705, 249 and 683 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 Gravenhurst number tells you

A number attached to Gravenhurst 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 7 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 Gravenhurst: code 705-468 is recorded for Iristel Inc., so every 705-468-XXXX number (10,000 possible) descends from that assignment. “Gravenhurst, Ontario” there names a rate centre, not a municipality, and several area codes overlay it.

Every Gravenhurst prefix

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

Allocated prefixes

All 11 in-service prefixes, grouped by rate centre.

Elsewhere in Ontario