Phone prefixes in Delta, ON

In numbers

In-service prefixes

5

Telephone numbers covered

50,000

Carriers

4

Area codes

2

Provinces and territories

1

First assignment

September 17, 2008

Most recent assignment

October 3, 2023

Delta’s share of its area codes

Within area code 343, Delta accounts for only 3 of 641 prefixes (0.5%): the code is dominated by Ottawa-Hull and spread over 116 rate centres. Within area code 613, Delta accounts for only 2 of 772 prefixes (0.3%): the code is dominated by Ottawa-Hull and spread over 132 rate centres.

Who holds these numbers

Fibernetics Corporation holds the largest share at 2 prefixes, 40.0% of the total, ahead of 3 other carriers. Code by code: in 343, Fibernetics Corporation leads with 1 of 3 prefixes ahead of 2 others; in 613, Fibernetics Corporation leads with 1 of 2 prefixes ahead of 1 others. 1 carrier holds prefixes in every one of Delta’s 2 area codes, while 3 appear in just one.

Wireless and wireline

None of Delta’s holders carries a mobility brand in its registered name: all 5 prefixes belong to wireline or wholesale carriers, among them Fibernetics Corporation, Bell Canada, TELUS Integrated Communications and Westport Telephone Company Limited. A call showing a Delta number therefore nominally comes from a landline, cable or VoIP platform rather than a locally assigned cellphone.

How the allocation was built up

Delta’s dated assignments run from 2008 to 2023. The busiest period was 2020–2024, when 2 prefixes went to 2 carriers. 1 prefixes (20%) 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.

Delta’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 Fibernetics Corporation in 2008. The most recent arrivals are Westport Telephone Company Limited (2021), TELUS Integrated Communications (2017) and Fibernetics Corporation (2008), a sign that new carriers are still asking for numbers in Delta.

Delta has just 5 prefixes (50,000 numbers): a very small rate centre, typical of a village or rural area served by a single switching office.

Fibernetics Corporation leads with 40.0% of the prefixes, but 3 competitors have set up in Delta: a market where the incumbent keeps the edge without exclusivity.

Growth is recent: 50.0% of the dated prefixes were assigned in the last ten years, peaking in 2020–2024. Delta is among the rate centres where demand for numbers is still rising quickly.

1 undated in the register.

Dialling a Delta number

Delta is served by 2 overlaid area codes (343 and 613). A 613 number is no more “out of town” than a 343 one; from abroad, dial +1 and the full ten digits.

The numbering neighbourhood

Delta shares area codes 343 and 613 with at least 20 other rate centres, including Ottawa-Hull, Kingston, Belleville, Cornwall, Kanata-Stittsville, Brockville, Smiths Falls and Bancroft. The largest of them, Ottawa-Hull, holds 425 prefixes in 343 and 613; the smallest on the list, Brighton, has just 10.

What a Delta number tells you

A number attached to Delta tells you that its prefix was issued to a carrier for this rate centre in Ontario, most often Fibernetics Corporation. 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 Delta: code 343-952 is recorded for Fibernetics Corporation, so every 343-952-XXXX number (10,000 possible) descends from that assignment. “Delta, Ontario” there names a rate centre, not a municipality, and several area codes overlay it.

Every Delta prefix

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

Allocated prefixes

All 5 in-service prefixes, grouped by rate centre.

Elsewhere in Ontario