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

SEEKONK prefixes in area code 508

NANPA records 4 assigned NXX blocks to rate center SEEKONK in area code 508, 0.5% of the 749 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. 4 holders hold those blocks, the largest being ONVOY SPECTRUM, LLC (1), VERIZON NEW ENGLAND INC. (1), TC SYSTEMS, INC. (1). 4 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 774 – overlay codes cover the same geography, so a rate center is served by all of them.

4 assigned blocks – 0.5% of 508
4 holders of record
4 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
508-262 Charter ONVOY SPECTRUM, LLC – yes yes
508-336 Verizon VERIZON NEW ENGLAND INC. – yes yes
508-343 AT&T TC SYSTEMS, INC. – yes yes
508-557 Comcast COMCAST IP PHONE, LLC – 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 SPECTRUM, LLC Charter 1 25%
VERIZON NEW ENGLAND INC. Verizon 1 25%
TC SYSTEMS, INC. AT&T 1 25%
COMCAST IP PHONE, LLC Comcast 1 25%

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 SEEKONK in area code 508?

4 blocks: 262, 336, 343, 557. The table above gives the holder of each.

Which carriers have numbers in SEEKONK?

ONVOY SPECTRUM, LLC (1 block), VERIZON NEW ENGLAND INC. (1 block), TC SYSTEMS, INC. (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 SEEKONK 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 508

All 749 prefixes in 508