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

SALEM prefixes in area code 330

NANPA records 4 assigned NXX blocks to rate center SALEM in area code 330, 0.5% of the 787 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 OHIO BELL TEL CO (2), T-MOBILE USA, INC. (1), SPOK, INC. (1). 1 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 207, 234, 262, 270 – overlay codes cover the same geography, so a rate center is served by all of them.

4 assigned blocks – 0.5% of 330
3 holders of record
1 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
330-277 T-Mobile T-MOBILE USA, INC. – yes yes
330-332 AT&T OHIO BELL TEL CO – no yes
330-337 AT&T OHIO BELL TEL CO – no yes
330-444 Spok SPOK, INC. – 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
OHIO BELL TEL CO AT&T 2 50%
T-MOBILE USA, INC. T-Mobile 1 25%
SPOK, INC. Spok 1 25%

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 SALEM in area code 330?

4 blocks: 277, 332, 337, 444. The table above gives the holder of each.

Which carriers have numbers in SALEM?

OHIO BELL TEL CO (2 blocks), T-MOBILE USA, INC. (1 block), SPOK, INC. (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is SALEM 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 330

All 787 prefixes in 330