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

GUILFORD prefixes in area code 207

NANPA records 3 assigned NXX blocks to rate center GUILFORD in area code 207, 0.4% of the 742 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 BELL ATLANTIC MOBILE, INC (1), UNITED STATES CELLULAR - ME (1), CONSOLIDATED COMM OF NO. NEW ENGLAND-ME (1). 3 of them are in thousands-block pooling, so those prefixes are shared between carriers in 1,000-number lots. The same rate center name also appears in area codes 203, 475, 607, 812 – overlay codes cover the same geography, so a rate center is served by all of them.

3 assigned blocks – 0.4% of 207
3 holders of record
3 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
207-343 BELL ATLANTIC MOBILE, INC – yes yes
207-717 UNITED STATES CELLULAR - ME – yes yes
207-876 Consolidated CONSOLIDATED COMM OF NO. NEW ENGLAND-ME – yes 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
BELL ATLANTIC MOBILE, INC – 1 33.3%
UNITED STATES CELLULAR - ME – 1 33.3%
CONSOLIDATED COMM OF NO. NEW ENGLAND-ME Consolidated 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 GUILFORD in area code 207?

3 blocks: 343, 717, 876. The table above gives the holder of each.

Which carriers have numbers in GUILFORD?

BELL ATLANTIC MOBILE, INC (1 block), UNITED STATES CELLULAR - ME (1 block), CONSOLIDATED COMM OF NO. NEW ENGLAND-ME (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is GUILFORD 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 207

All 742 prefixes in 207