Phone prefixes in Calstock, ON

In numbers

In-service prefixes

1

Telephone numbers covered

10,000

Carriers

1

Area codes

1

Provinces and territories

1

Calstock’s share of its area code

Within area code 705, Calstock accounts for only 1 of 770 prefixes (0.1%): the code is dominated by Barrie and spread over 203 rate centres.

Who holds these numbers

Northern Telephone Ltd. holds every prefix here. Code by code: Northern Telephone Ltd. is the only holder in 705.

Wireless and wireline

None of Calstock’s holders carries a mobility brand in its registered name: all 1 prefixes belong to wireline or wholesale carriers, among them Northern Telephone Ltd. A call showing a Calstock 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 Calstock’s assignments: all 1 prefixes predate CNAC’s record-keeping, the signature of an old, settled network where nothing has been added in decades.

Northern Telephone Ltd. is the only carrier ever recorded for Calstock: 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.

Calstock 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: Northern Telephone Ltd. holds every prefix, and no competitor has ever requested a code for Calstock.

Dialling a Calstock number

A single area code, 705, covers Calstock, 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 +1 705 and the seven-digit number.

The numbering neighbourhood

Calstock shares area code 705 with at least 20 other rate centres, including Barrie, Sudbury, Peterborough, Sault Ste. Marie, North Bay, Lindsay, Timmins and Orillia. The largest of them, Barrie, holds 71 prefixes in 705; the smallest on the list, Blezard Valley, has just 6.

What a Calstock number tells you

A number attached to Calstock tells you that its prefix was issued to a carrier for this rate centre in Ontario, most often Northern Telephone Ltd.. 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 Ontario area code is easy to borrow to look local.

Reading a register entry for Calstock: code 705-463 is recorded for Northern Telephone Ltd., so every 705-463-XXXX number (10,000 possible) descends from that assignment. “Calstock, Ontario” there names a rate centre, not a municipality.

Every Calstock prefix

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

Allocated prefixes

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

Elsewhere in Ontario