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

STORRS prefixes in area code 860

NANPA records 9 assigned NXX blocks to rate center STORRS in area code 860, 1.1% 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 PAETEC ITEL, LLC (3), SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT (2), MCIMETRO ACCESS TRANSMISSION SERVICES LLC (1). The earliest assignment on record here is 2004-12-14 and the most recent 2004-12-14. 6 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.

9 assigned blocks – 1.1% of 860
6 holders of record
6 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
860-341 Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC – yes yes
860-420 AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CT – yes yes
860-427 Windstream PAETEC ITEL, LLC – no yes
860-429 AT&T SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT – no yes
860-477 Charter CHARTER IP ENABLED SERVICES, LLC 2004-12-14 yes yes
860-486 Windstream PAETEC ITEL, LLC – no yes
860-487 AT&T SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT – yes yes
860-553 Windstream PAETEC ITEL, LLC – yes yes
860-864 Onvoy ONVOY, LLC - 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
PAETEC ITEL, LLC Windstream 3 33.3%
SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT AT&T 2 22.2%
MCIMETRO ACCESS TRANSMISSION SERVICES LLC Verizon 1 11.1%
TELEPORT COMMUNICATIONS AMERICA, LLC - CT AT&T 1 11.1%
CHARTER IP ENABLED SERVICES, LLC Charter 1 11.1%
ONVOY, LLC - CT Onvoy 1 11.1%

Frequently asked

Which prefixes belong to STORRS in area code 860?

9 blocks: 341, 420, 427, 429, 477, 486, 487, 553, 864. The table above gives the holder of each.

Which carriers have numbers in STORRS?

PAETEC ITEL, LLC (3 blocks), SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT (2 blocks), MCIMETRO ACCESS TRANSMISSION SERVICES LLC (1 block), TELEPORT COMMUNICATIONS AMERICA, LLC - CT (1 block), CHARTER IP ENABLED SERVICES, LLC (1 block), ONVOY, 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 STORRS 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