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

WATERTOWN prefixes in area code 860

NANPA records 7 assigned NXX blocks to rate center WATERTOWN in area code 860, 0.9% 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 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT (2), TELEPORT COMMUNICATIONS AMERICA, LLC - CT (1), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT (1). The earliest assignment on record here is 2023-06-15 and the most recent 2023-06-15. 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 315, 605, 615, 617 – overlay codes cover the same geography, so a rate center is served by all of them.

7 assigned blocks – 0.9% of 860
6 holders of record
5 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
860-274 AT&T SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT – no yes
860-417 AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CT – yes yes
860-483 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT – yes yes
860-590 Onvoy ONVOY, LLC - CT – yes yes
860-631 Windstream PAETEC ITEL, LLC – yes yes
860-945 AT&T SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT – no yes
860-981 Comcast COMCAST IP PHONE, LLC 2023-06-15 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
SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT AT&T 2 28.6%
TELEPORT COMMUNICATIONS AMERICA, LLC - CT AT&T 1 14.3%
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT Verizon 1 14.3%
ONVOY, LLC - CT Onvoy 1 14.3%
PAETEC ITEL, LLC Windstream 1 14.3%
COMCAST IP PHONE, LLC Comcast 1 14.3%

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 WATERTOWN in area code 860?

7 blocks: 274, 417, 483, 590, 631, 945, 981. The table above gives the holder of each.

Which carriers have numbers in WATERTOWN?

SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT (2 blocks), TELEPORT COMMUNICATIONS AMERICA, LLC - CT (1 block), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT (1 block), ONVOY, LLC - CT (1 block), PAETEC ITEL, LLC (1 block), COMCAST IP PHONE, 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 WATERTOWN 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