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

DEEP RIVER prefixes in area code 860

NANPA records 8 assigned NXX blocks to rate center DEEP RIVER in area code 860, 1.0% of the 783 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. 6 holders hold those blocks, the largest being MCIMETRO ACCESS TRANSMISSION SERVICES LLC (2), OMNIPOINT COMMUNICATIONS, INC. - CT (2), SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT (1). The earliest assignment on record here is 2001-03-26 and the most recent 2001-03-26. 8 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 641, 959 – overlay codes cover the same geography, so a rate center is served by all of them.

8 assigned blocks – 1% of 860
6 holders of record
8 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
860-322 Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC – yes yes
860-374 Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC – yes yes
860-526 AT&T SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT – yes yes
860-532 AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CT – yes yes
860-718 Onvoy ONVOY, LLC - CT – yes yes
860-790 T-Mobile OMNIPOINT COMMUNICATIONS, INC. - CT – yes yes
860-879 Lumen LEVEL 3 COMMUNICATIONS, LLC - CT – yes yes
860-938 T-Mobile OMNIPOINT COMMUNICATIONS, INC. - CT 2001-03-26 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
MCIMETRO ACCESS TRANSMISSION SERVICES LLC Verizon 2 25%
OMNIPOINT COMMUNICATIONS, INC. - CT T-Mobile 2 25%
SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT AT&T 1 12.5%
TELEPORT COMMUNICATIONS AMERICA, LLC - CT AT&T 1 12.5%
ONVOY, LLC - CT Onvoy 1 12.5%
LEVEL 3 COMMUNICATIONS, LLC - CT Lumen 1 12.5%

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 DEEP RIVER in area code 860?

8 blocks: 322, 374, 526, 532, 718, 790, 879, 938. The table above gives the holder of each.

Which carriers have numbers in DEEP RIVER?

MCIMETRO ACCESS TRANSMISSION SERVICES LLC (2 blocks), OMNIPOINT COMMUNICATIONS, INC. - CT (2 blocks), SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT (1 block), TELEPORT COMMUNICATIONS AMERICA, LLC - CT (1 block), ONVOY, LLC - CT (1 block), LEVEL 3 COMMUNICATIONS, LLC - CT (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is DEEP RIVER 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 860

All 783 prefixes in 860