Phone prefixes in Robb, AB

In numbers

In-service prefixes

1

Telephone numbers covered

10,000

Carriers

1

Area codes

1

Provinces and territories

1

Robb’s share of its area code

Within area code 780, Robb accounts for only 1 of 780 prefixes (0.1%): the code is dominated by Edmonton and spread over 195 rate centres.

Who holds these numbers

TELUS holds every prefix here. Code by code: TELUS is the only holder in 780.

Wireless and wireline

None of Robb’s holders carries a mobility brand in its registered name: all 1 prefixes belong to wireline or wholesale carriers, among them TELUS. A call showing a Robb number therefore nominally comes from a landline, cable or VoIP platform rather than a locally assigned cellphone.

How the allocation was built up

The register dates none of Robb’s assignments: all 1 prefixes predate CNAC’s record-keeping, the signature of an old, settled network where nothing has been added in decades.

TELUS is the only carrier ever recorded for Robb: no competitor has obtained a prefix here. A single-carrier rate centre is typical of small communities where only the incumbent ever built a network.

Robb has just 1 prefix (10,000 numbers): a very small rate centre, typical of a village or rural area served by a single switching office.

The local market is an allocation monopoly: TELUS holds every prefix, and no competitor has ever requested a code for Robb.

Dialling a Robb number

A single area code, 780, covers Robb, and it is not overlaid with any other code on this territory: one of the few parts of Canada where seven-digit local dialling may still work. From abroad, dial +1 780 and the seven-digit number.

The numbering neighbourhood

Robb shares area code 780 with at least 20 other rate centres, including Edmonton, Fort McMurray, Grande Prairie, St. Albert, Lloydminster, Sherwood Park, Bonnyville and Camrose. The largest of them, Edmonton, holds 274 prefixes in 780; the smallest on the list, Wainwright, has just 7.

What a Robb number tells you

A number attached to Robb tells you that its prefix was issued to a carrier for this rate centre in Alberta, most often TELUS. It does not tell you where the handset is today: a subscriber may have ported the number to any of the 1 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 Robb: code 780-794 is recorded for TELUS, so every 780-794-XXXX number (10,000 possible) descends from that assignment. “Robb, Alberta” there names a rate centre, not a municipality.

Every Robb prefix

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

Allocated prefixes

All 1 in-service prefixes, grouped by rate centre.

Elsewhere in Alberta