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

MYSTIC prefixes in area code 860

NANPA records 7 assigned NXX blocks to rate center MYSTIC 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. 3 holders hold those blocks, the largest being SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT (5), TELEPORT COMMUNICATIONS AMERICA, LLC - CT (1), BANDWIDTH.COM CLEC, LLC - CT (1). The earliest assignment on record here is 2015-04-23 and the most recent 2015-04-23. 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 641, 959 – overlay codes cover the same geography, so a rate center is served by all of them.

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

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
860-245 AT&T SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT – yes yes
860-396 AT&T SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT – no yes
860-415 AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CT – yes yes
860-535 AT&T SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT – yes yes
860-536 AT&T SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT – no yes
860-572 AT&T SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT – yes yes
860-980 Bandwidth BANDWIDTH.COM CLEC, LLC - CT 2015-04-23 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 5 71.4%
TELEPORT COMMUNICATIONS AMERICA, LLC - CT AT&T 1 14.3%
BANDWIDTH.COM CLEC, LLC - CT Bandwidth 1 14.3%

Frequently asked

Which prefixes belong to MYSTIC in area code 860?

7 blocks: 245, 396, 415, 535, 536, 572, 980. The table above gives the holder of each.

Which carriers have numbers in MYSTIC?

SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT (5 blocks), TELEPORT COMMUNICATIONS AMERICA, LLC - CT (1 block), BANDWIDTH.COM CLEC, 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 MYSTIC 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