Phone prefixes in Radium, BC

In numbers

In-service prefixes

3

Telephone numbers covered

30,000

Carriers

3

Area codes

3

Provinces and territories

1

First assignment

August 17, 2011

Most recent assignment

May 9, 2016

Radium’s share of its area codes

Within area code 236, Radium accounts for only 1 of 730 prefixes (0.1%): the code is dominated by Vancouver and spread over 269 rate centres. Within area code 250, Radium accounts for only 1 of 781 prefixes (0.1%): the code is dominated by Victoria and spread over 268 rate centres. Within area code 778, Radium accounts for only 1 of 779 prefixes (0.1%): the code is dominated by Vancouver and spread over 159 rate centres.

Who holds these numbers

Navigata Communications Limited holds the largest share at 1 prefixes, 33.3% of the total, ahead of 2 other carriers. Code by code: Navigata Communications Limited is the only holder in 236; TELUS is the only holder in 250; Shaw Telecom Inc. is the only holder in 778. No carrier holds prefixes in every one of Radium’s 3 area codes, while 3 appear in just one.

Wireless and wireline

None of Radium’s holders carries a mobility brand in its registered name: all 3 prefixes belong to wireline or wholesale carriers, among them Navigata Communications Limited, Shaw Telecom Inc and TELUS. A call showing a Radium number therefore nominally comes from a landline, cable or VoIP platform rather than a locally assigned cellphone.

How the allocation was built up

Radium’s dated assignments run from 2011 to 2016. The busiest period was 2010–2014, when 1 prefixes went to 1 carrier. 1 prefixes (33%) carry no date in the register: these are the historic pre-1999 assignments, the wireline bedrock of the rate centre. No prefix has been added since 2020: demand for numbers in Radium is flat.

Radium’s oldest prefixes, the ones the register leaves undated, belong to TELUS: this carrier made up the landscape before competition arrived. The first dated assignment went to Shaw Telecom Inc. in 2011. The most recent arrivals are Navigata Communications Limited (2016) and Shaw Telecom Inc. (2011), a sign that new carriers are still asking for numbers in Radium.

Radium has just 3 prefixes (30,000 numbers): a very small rate centre, typical of a village or rural area served by a single switching office.

No single carrier dominates Radium: the leader, Navigata Communications Limited, holds only 33.3% of the prefixes against 2 competitors, a sign of a highly fragmented market where cable companies, mobility brands and VoIP providers weigh as much as the incumbent.

Allocation is mature: only 0.0% of the dated prefixes are less than ten years old, most having been handed out in 2010–2014, and 1 prefixes go back to the undated monopoly era. New Radium numbers mostly come out of blocks that were assigned long ago.

1 undated in the register.

Dialling a Radium number

Radium is served by 3 overlaid area codes (236, 250 and 778). A 778 number is no more “out of town” than a 236 one; from abroad, dial +1 and the full ten digits.

The numbering neighbourhood

Radium shares area codes 236, 250 and 778 with at least 20 other rate centres, including Vancouver, Victoria, Kelowna, New Westminster, Nanaimo, South Kamloops, Prince George and Abbotsford. The largest of them, Vancouver, holds 314 prefixes in 236 and 778; the smallest on the list, North Vancouver, has just 21.

What a Radium number tells you

A number attached to Radium tells you that its prefix was issued to a carrier for this rate centre in British Columbia, most often Navigata Communications Limited. It does not tell you where the handset is today: a subscriber may have ported the number to any of the 3 carriers present here or to a VoIP service usable anywhere. Nor does it tell you who is calling: caller ID can be spoofed, and a British Columbia area code is easy to borrow to look local.

Reading a register entry for Radium: code 236-529 is recorded for Navigata Communications Limited, so every 236-529-XXXX number (10,000 possible) descends from that assignment. “Radium, British Columbia” there names a rate centre, not a municipality, and several area codes overlay it.

Every Radium prefix

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

Allocated prefixes

All 3 in-service prefixes, grouped by rate centre.

Elsewhere in British Columbia