NumberingData
Verified Nov 1, 2026 · Source: NANPA CO Code Assignment Records

SANBORN prefixes in area code 712

NANPA records 3 assigned NXX blocks to rate center SANBORN in area code 712, 0.5% of the 633 blocks assigned in the code. A rate center is the billing geography a block is allocated to – NANPA truncates the name to ten characters, so read it as a NANPA label rather than a town. 3 holders hold those blocks, the largest being NEW CINGULAR WIRELESS PCS, LLC - IL (1), NORTHERN IOWA TEL. CO. (1), COMMUNITY CABLE TV AGCY O'BRIEN CO. DBA COMM.-IA (1). The earliest assignment on record here is 2002-01-22 and the most recent 2006-03-08. The same rate center name also appears in area codes 507, 701, 716 – overlay codes cover the same geography, so a rate center is served by all of them.

3 assigned blocks – 0.5% of 712
3 holders of record
0 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
712-630 AT&T NEW CINGULAR WIRELESS PCS, LLC - IL 2006-03-08 no yes
712-729 NORTHERN IOWA TEL. CO. – no yes
712-930 COMMUNITY CABLE TV AGCY O'BRIEN CO. DBA COMM.-IA 2002-01-22 no yes

The holder is who received the block from the numbering administrator. It is not necessarily the carrier serving a given number: numbers move with their owners, and a pooled block is shared.

Who holds the blocks

HolderBrandBlocksShare here
NEW CINGULAR WIRELESS PCS, LLC - IL AT&T 1 33.3%
NORTHERN IOWA TEL. CO. – 1 33.3%
COMMUNITY CABLE TV AGCY O'BRIEN CO. DBA COMM.-IA – 1 33.3%

Same rate center in other codes

Overlay codes cover the same geography, so one rate center is served by all of them.

Frequently asked

Which prefixes belong to SANBORN in area code 712?

3 blocks: 630, 729, 930. The table above gives the holder of each.

Which carriers have numbers in SANBORN?

NEW CINGULAR WIRELESS PCS, LLC - IL (1 block), NORTHERN IOWA TEL. CO. (1 block), COMMUNITY CABLE TV AGCY O'BRIEN CO. DBA COMM.-IA (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is SANBORN a city?

It is a rate center – the unit NANPA allocates number blocks to. Its name is abbreviated to ten characters and is not necessarily a settlement: we print it as recorded rather than guess at the full name.

Other rate centers in 712

All 633 prefixes in 712