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

TOMPKINSVL prefixes in area code 240

NANPA records 6 assigned NXX blocks to rate center TOMPKINSVL in area code 240, 0.8% of the 785 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. 5 holders hold those blocks, the largest being PEERLESS NETWORK OF MARYLAND, LLC (2), TELEPORT COMMUNICATIONS AMERICA, LLC - DC (1), CORE COMMUNICATIONS, INC.- MD (1). The earliest assignment on record here is 2013-04-09 and the most recent 2021-04-29. 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 codes 270, 301 – overlay codes cover the same geography, so a rate center is served by all of them.

6 assigned blocks – 0.8% of 240
5 holders of record
6 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
240-233 AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - DC – yes yes
240-332 Peerless PEERLESS NETWORK OF MARYLAND, LLC – yes yes
240-503 Peerless PEERLESS NETWORK OF MARYLAND, LLC 2013-04-09 yes yes
240-635 CORE COMMUNICATIONS, INC.- MD 2018-06-11 yes yes
240-804 Onvoy ONVOY, LLC - MD – yes yes
240-884 Charter ONVOY SPECTRUM, LLC 2021-04-29 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
PEERLESS NETWORK OF MARYLAND, LLC Peerless 2 33.3%
TELEPORT COMMUNICATIONS AMERICA, LLC - DC AT&T 1 16.7%
CORE COMMUNICATIONS, INC.- MD – 1 16.7%
ONVOY, LLC - MD Onvoy 1 16.7%
ONVOY SPECTRUM, LLC Charter 1 16.7%

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 TOMPKINSVL in area code 240?

6 blocks: 233, 332, 503, 635, 804, 884. The table above gives the holder of each.

Which carriers have numbers in TOMPKINSVL?

PEERLESS NETWORK OF MARYLAND, LLC (2 blocks), TELEPORT COMMUNICATIONS AMERICA, LLC - DC (1 block), CORE COMMUNICATIONS, INC.- MD (1 block), ONVOY, LLC - MD (1 block), ONVOY SPECTRUM, 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 TOMPKINSVL 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 240

All 785 prefixes in 240