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

GLASTONBY prefixes in area code 860

NANPA records 17 assigned NXX blocks to rate center GLASTONBY in area code 860, 2.2% 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. 9 holders hold those blocks, the largest being SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT (6), MCIMETRO ACCESS TRANSMISSION SERVICES LLC (2), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT (2). The earliest assignment on record here is 2001-05-01 and the most recent 2001-05-01. 16 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 code 959 – overlay codes cover the same geography, so a rate center is served by all of them.

17 assigned blocks – 2.2% of 860
9 holders of record
16 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
860-266 Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC – yes yes
860-328 T-Mobile OMNIPOINT COMMUNICATIONS, INC. - CT 2001-05-01 yes yes
860-338 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT – yes yes
860-368 AT&T SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT – yes yes
860-430 Comcast COMCAST IP PHONE, LLC – yes yes
860-494 AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CT – yes yes
860-633 AT&T SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT – no yes
860-652 AT&T SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT – yes yes
860-657 AT&T SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT – yes yes
860-659 AT&T SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT – yes yes
860-682 AT&T SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT – yes yes
860-734 Windstream PAETEC ITEL, LLC – yes yes
860-780 Lumen LEVEL 3 COMMUNICATIONS, LLC - CT – yes yes
860-781 Windstream PAETEC ITEL, LLC – yes yes
860-815 Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC – yes yes
860-918 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT – yes yes
860-968 AT&T AT&T - LOCAL – 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 35.3%
MCIMETRO ACCESS TRANSMISSION SERVICES LLC Verizon 2 11.8%
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT Verizon 2 11.8%
PAETEC ITEL, LLC Windstream 2 11.8%
OMNIPOINT COMMUNICATIONS, INC. - CT T-Mobile 1 5.9%
COMCAST IP PHONE, LLC Comcast 1 5.9%
TELEPORT COMMUNICATIONS AMERICA, LLC - CT AT&T 1 5.9%
LEVEL 3 COMMUNICATIONS, LLC - CT Lumen 1 5.9%
AT&T - LOCAL AT&T 1 5.9%

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 GLASTONBY in area code 860?

17 blocks: 266, 328, 338, 368, 430, 494, 633, 652, 657, 659, 682, 734 and 5 more, all listed in the table above.

Which carriers have numbers in GLASTONBY?

SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT (6 blocks), MCIMETRO ACCESS TRANSMISSION SERVICES LLC (2 blocks), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT (2 blocks), PAETEC ITEL, LLC (2 blocks), OMNIPOINT COMMUNICATIONS, INC. - CT (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 GLASTONBY 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