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

MIDDLETOWN prefixes in area code 707

NANPA records 4 assigned NXX blocks to rate center MIDDLETOWN in area code 707, 0.5% 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. 4 holders hold those blocks, the largest being UNITED STATES CELLULAR - CA (1), PEERLESS NETWORK OF CALIFORNIA, LLC - CA (1), ONVOY, LLC - CA (1). The earliest assignment on record here is 2019-08-27 and the most recent 2019-08-27. 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 codes 223, 227, 240, 283 – overlay codes cover the same geography, so a rate center is served by all of them.

4 assigned blocks – 0.5% of 707
4 holders of record
4 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
707-355 UNITED STATES CELLULAR - CA – yes yes
707-802 Peerless PEERLESS NETWORK OF CALIFORNIA, LLC - CA 2019-08-27 yes yes
707-809 Onvoy ONVOY, LLC - CA – yes yes
707-987 AT&T PACIFIC BELL – 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
UNITED STATES CELLULAR - CA – 1 25%
PEERLESS NETWORK OF CALIFORNIA, LLC - CA Peerless 1 25%
ONVOY, LLC - CA Onvoy 1 25%
PACIFIC BELL AT&T 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 MIDDLETOWN in area code 707?

4 blocks: 355, 802, 809, 987. The table above gives the holder of each.

Which carriers have numbers in MIDDLETOWN?

UNITED STATES CELLULAR - CA (1 block), PEERLESS NETWORK OF CALIFORNIA, LLC - CA (1 block), ONVOY, LLC - CA (1 block), PACIFIC BELL (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is MIDDLETOWN 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 707

All 785 prefixes in 707