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

TRUMBULL prefixes in area code 475

NANPA records 7 assigned NXX blocks to rate center TRUMBULL in area code 475, 2.4% of the 292 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 ONVOY, LLC - CT (2), CHARTER IP ENABLED SERVICES, LLC (1), PEERLESS NETWORK OF CONNECTICUT, LLC - CT (1). The earliest assignment on record here is 2012-10-02 and the most recent 2025-02-07. 7 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 203, 402, 440 – overlay codes cover the same geography, so a rate center is served by all of them.

7 assigned blocks – 2.4% of 475
6 holders of record
7 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
475-231 Charter CHARTER IP ENABLED SERVICES, LLC 2016-08-01 yes yes
475-239 Peerless PEERLESS NETWORK OF CONNECTICUT, LLC - CT 2012-10-02 yes yes
475-265 Bandwidth BANDWIDTH.COM CLEC, LLC - CT 2020-02-05 yes yes
475-324 Onvoy ONVOY, LLC - CT 2023-06-23 yes yes
475-386 AT&T NEW CINGULAR WIRELESS PCS, LLC - DC 2025-02-07 yes yes
475-467 TON80 COMMUNICATIONS, LLC 2022-01-25 yes yes
475-474 Onvoy ONVOY, LLC - CT 2021-02-04 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
ONVOY, LLC - CT Onvoy 2 28.6%
CHARTER IP ENABLED SERVICES, LLC Charter 1 14.3%
PEERLESS NETWORK OF CONNECTICUT, LLC - CT Peerless 1 14.3%
BANDWIDTH.COM CLEC, LLC - CT Bandwidth 1 14.3%
NEW CINGULAR WIRELESS PCS, LLC - DC AT&T 1 14.3%
TON80 COMMUNICATIONS, LLC – 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 TRUMBULL in area code 475?

7 blocks: 231, 239, 265, 324, 386, 467, 474. The table above gives the holder of each.

Which carriers have numbers in TRUMBULL?

ONVOY, LLC - CT (2 blocks), CHARTER IP ENABLED SERVICES, LLC (1 block), PEERLESS NETWORK OF CONNECTICUT, LLC - CT (1 block), BANDWIDTH.COM CLEC, LLC - CT (1 block), NEW CINGULAR WIRELESS PCS, LLC - DC (1 block), TON80 COMMUNICATIONS, 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 TRUMBULL 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 475

All 292 prefixes in 475