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

CAROLINA prefixes in area code 401

NANPA records 6 assigned NXX blocks to rate center CAROLINA in area code 401, 1.0% of the 581 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. 5 holders hold those blocks, the largest being COMCAST IP PHONE, LLC (2), ONVOY, LLC - RI (1), VERIZON NEW ENGLAND INC. (1). The earliest assignment on record here is 2012-06-11 and the most recent 2021-04-20. 5 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 787, 939 – overlay codes cover the same geography, so a rate center is served by all of them.

6 assigned blocks – 1% of 401
5 holders of record
5 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
401-213 Comcast COMCAST IP PHONE, LLC – yes yes
401-238 Onvoy ONVOY, LLC - RI – no yes
401-364 Verizon VERIZON NEW ENGLAND INC. – yes yes
401-409 AT&T AT&T - LOCAL 2012-06-11 yes yes
401-552 Comcast COMCAST IP PHONE, LLC – yes yes
401-746 TON80 COMMUNICATIONS, LLC 2021-04-20 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
COMCAST IP PHONE, LLC Comcast 2 33.3%
ONVOY, LLC - RI Onvoy 1 16.7%
VERIZON NEW ENGLAND INC. Verizon 1 16.7%
AT&T - LOCAL AT&T 1 16.7%
TON80 COMMUNICATIONS, LLC – 1 16.7%

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 CAROLINA in area code 401?

6 blocks: 213, 238, 364, 409, 552, 746. The table above gives the holder of each.

Which carriers have numbers in CAROLINA?

COMCAST IP PHONE, LLC (2 blocks), ONVOY, LLC - RI (1 block), VERIZON NEW ENGLAND INC. (1 block), AT&T - LOCAL (1 block), TON80 COMMUNICATIONS, LLC (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is CAROLINA 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 401

All 581 prefixes in 401