Phone prefixes in Port Robinson, ON

In numbers

In-service prefixes

7

Telephone numbers covered

70,000

Carriers

7

Area codes

4

Provinces and territories

1

First assignment

December 20, 2007

Most recent assignment

December 18, 2024

Port Robinson’s share of its area codes

Within area code 365, Port Robinson accounts for only 4 of 704 prefixes (0.6%): the code is dominated by Markham and spread over 88 rate centres. Within area code 289, Port Robinson accounts for only 1 of 772 prefixes (0.1%): the code is dominated by Hamilton and spread over 87 rate centres. Within area code 742, Port Robinson accounts for only 1 of 146 prefixes (0.7%): the code is dominated by Brampton and spread over 68 rate centres. Within area code 905, Port Robinson accounts for only 1 of 773 prefixes (0.1%): the code is dominated by Hamilton and spread over 94 rate centres.

Who holds these numbers

Bell Canada holds the largest share at 1 prefixes, 14.3% of the total, ahead of 6 other carriers. Code by code: in 365, Distributel leads with 1 of 4 prefixes ahead of 3 others; TELUS Integrated Communications is the only holder in 289; Rogers Communications Canada Inc. (Cable) is the only holder in 742; Bell Canada is the only holder in 905. No carrier holds prefixes in every one of Port Robinson’s 4 area codes, while 7 appear in just one.

Wireless and wireline

None of Port Robinson’s holders carries a mobility brand in its registered name: all 7 prefixes belong to wireline or wholesale carriers, among them Bell Canada, Distributel, Fibernetics Corporation and ISP Telecom Inc. A call showing a Port Robinson number therefore nominally comes from a landline, cable or VoIP platform rather than a locally assigned cellphone.

How the allocation was built up

Port Robinson’s dated assignments run from 2007 to 2024. The busiest period was 2020–2024, when 4 prefixes went to 4 carriers. 1 prefixes (14%) carry no date in the register: these are the historic pre-1999 assignments, the wireline bedrock of the rate centre. Since 2020 another 4 prefixes have been added, so the rate centre is still growing.

Port Robinson’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 Rogers Communications Canada Inc. (Cable) (2024), ISP Telecom Inc. (2023) and Fibernetics Corporation (2022), a sign that new carriers are still asking for numbers in Port Robinson.

Port Robinson has just 7 prefixes (70,000 numbers): a very small rate centre, typical of a village or rural area served by a single switching office.

No single carrier dominates Port Robinson: the leader, Bell Canada, holds only 14.3% 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: 66.7% of the dated prefixes were assigned in the last ten years, peaking in 2020–2024. Port Robinson is among the rate centres where demand for numbers is still rising quickly.

1 undated in the register.

Dialling a Port Robinson number

Port Robinson is served by 4 overlaid area codes (365, 289, 742 and 905). A 905 number is no more “out of town” than a 365 one; from abroad, dial +1 and the full ten digits.

The numbering neighbourhood

Port Robinson shares area codes 365, 289, 742 and 905 with at least 20 other rate centres, including Hamilton, Brampton, Oshawa, St. Catharines-Thorold, Oakville, Markham, Ajax-Pickering and Cooksville. The largest of them, Hamilton, holds 221 prefixes in 289, 365, 742 and 905; the smallest on the list, Dunnville, has just 28.

What a Port Robinson number tells you

A number attached to Port Robinson 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 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 Port Robinson: code 905-384 is recorded for Bell Canada, so every 905-384-XXXX number (10,000 possible) descends from that assignment. “Port Robinson, Ontario” there names a rate centre, not a municipality, and several area codes overlay it.

Every Port Robinson prefix

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

Had a call from a Port Robinson 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 7 in-service prefixes, grouped by rate centre.

Elsewhere in Ontario