Phone prefixes in Ralston, AB

In numbers

In-service prefixes

3

Telephone numbers covered

30,000

Carriers

3

Area codes

2

Provinces and territories

1

First assignment

April 21, 2009

Most recent assignment

June 17, 2016

Ralston’s share of its area codes

Within area code 403, Ralston accounts for only 2 of 781 prefixes (0.3%): the code is dominated by Calgary and spread over 142 rate centres. Within area code 825, Ralston accounts for only 1 of 769 prefixes (0.1%): the code is dominated by Calgary and spread over 301 rate centres.

Who holds these numbers

Distributel holds the largest share at 1 prefixes, 33.3% of the total, ahead of 2 other carriers. Code by code: in 403, Shaw Telecom Inc. leads with 1 of 2 prefixes ahead of 1 others; Distributel is the only holder in 825. No carrier holds prefixes in every one of Ralston’s 2 area codes, while 3 appear in just one.

Wireless and wireline

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

How the allocation was built up

Ralston’s dated assignments run from 2009 to 2016. The busiest period was 2005–2009, 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 Ralston is flat.

Ralston’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 2009. The most recent arrivals are Distributel (2016) and Shaw Telecom Inc. (2009), a sign that new carriers are still asking for numbers in Ralston.

Ralston 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 Ralston: the leader, Distributel, 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 2005–2009, and 1 prefixes go back to the undated monopoly era. New Ralston numbers mostly come out of blocks that were assigned long ago.

1 undated in the register.

Dialling a Ralston number

Ralston is served by 2 overlaid area codes (403 and 825). A 825 number is no more “out of town” than a 403 one; from abroad, dial +1 and the full ten digits.

The numbering neighbourhood

Ralston shares area codes 403 and 825 with at least 20 other rate centres, including Calgary, Edmonton, Red Deer, Lethbridge, Medicine Hat, High River, Canmore and Banff. The largest of them, Calgary, holds 516 prefixes in 403 and 825; the smallest on the list, Okotoks, has just 10.

What a Ralston number tells you

A number attached to Ralston tells you that its prefix was issued to a carrier for this rate centre in Alberta, most often Distributel. 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 an Alberta area code is easy to borrow to look local.

Reading a register entry for Ralston: code 825-702 is recorded for Distributel, so every 825-702-XXXX number (10,000 possible) descends from that assignment. “Ralston, Alberta” there names a rate centre, not a municipality, and several area codes overlay it.

Every Ralston prefix

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

Allocated prefixes

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

Elsewhere in Alberta