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

DUCHESNE prefixes in area code 435

NANPA records 5 assigned NXX blocks to rate center DUCHESNE in area code 435, 1.0% of the 501 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 NEW CINGULAR WIRELESS PCS, LLC (2), UBTA-UBET COMMUNICATIONS, INC. DBA STRATA NETWORKS (1), UNION TELEPHONE COMPANY (1). The earliest assignment on record here is 2004-04-29 and the most recent 2010-10-18. 2 of them are in thousands-block pooling, so those prefixes are shared between carriers in 1,000-number lots.

5 assigned blocks – 1% of 435
4 holders of record
2 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
435-322 AT&T NEW CINGULAR WIRELESS PCS, LLC 2010-10-18 yes yes
435-733 AT&T NEW CINGULAR WIRELESS PCS, LLC – yes yes
435-738 UBTA-UBET COMMUNICATIONS, INC. DBA STRATA NETWORKS – no yes
435-768 UNION TELEPHONE COMPANY 2004-04-29 no yes
435-822 UINTAH BASIN ELECTRONIC TELECOMMUNICATIONS – no 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
NEW CINGULAR WIRELESS PCS, LLC AT&T 2 40%
UBTA-UBET COMMUNICATIONS, INC. DBA STRATA NETWORKS – 1 20%
UNION TELEPHONE COMPANY – 1 20%
UINTAH BASIN ELECTRONIC TELECOMMUNICATIONS – 1 20%

Frequently asked

Which prefixes belong to DUCHESNE in area code 435?

5 blocks: 322, 733, 738, 768, 822. The table above gives the holder of each.

Which carriers have numbers in DUCHESNE?

NEW CINGULAR WIRELESS PCS, LLC (2 blocks), UBTA-UBET COMMUNICATIONS, INC. DBA STRATA NETWORKS (1 block), UNION TELEPHONE COMPANY (1 block), UINTAH BASIN ELECTRONIC TELECOMMUNICATIONS (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is DUCHESNE 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 435

All 501 prefixes in 435