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

NEWMILFORD prefixes in area code 860

NANPA records 12 assigned NXX blocks to rate center NEWMILFORD in area code 860, 1.5% 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. 5 holders hold those blocks, the largest being SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT (6), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT (2), PAETEC ITEL, LLC (2). The earliest assignment on record here is 2005-07-21 and the most recent 2014-07-21. 9 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 272, 570, 779, 815 – overlay codes cover the same geography, so a rate center is served by all of them.

12 assigned blocks – 1.5% of 860
5 holders of record
9 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
860-210 AT&T SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT – yes yes
860-350 AT&T SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT – no yes
860-354 AT&T SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT – no yes
860-355 AT&T SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT – no yes
860-488 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT – yes yes
860-717 AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CT 2010-03-15 yes yes
860-750 AT&T SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 2014-07-21 yes yes
860-799 Lumen LEVEL 3 COMMUNICATIONS, LLC - CT – yes yes
860-898 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 2005-07-21 yes yes
860-915 Windstream PAETEC ITEL, LLC – yes yes
860-946 Windstream PAETEC ITEL, LLC – yes yes
860-957 AT&T SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT – 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 6 50%
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT Verizon 2 16.7%
PAETEC ITEL, LLC Windstream 2 16.7%
TELEPORT COMMUNICATIONS AMERICA, LLC - CT AT&T 1 8.3%
LEVEL 3 COMMUNICATIONS, LLC - CT Lumen 1 8.3%

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 NEWMILFORD in area code 860?

12 blocks: 210, 350, 354, 355, 488, 717, 750, 799, 898, 915, 946, 957. The table above gives the holder of each.

Which carriers have numbers in NEWMILFORD?

SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT (6 blocks), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT (2 blocks), PAETEC ITEL, LLC (2 blocks), TELEPORT COMMUNICATIONS AMERICA, 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 NEWMILFORD 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