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

MONUMNTVLY prefixes in area code 435

NANPA records 3 assigned NXX blocks to rate center MONUMNTVLY in area code 435, 0.6% 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. 2 holders hold those blocks, the largest being NAVAJO COMM CO INC - UT DBA NAVAJO COMM UT (2), NEW CINGULAR WIRELESS PCS, LLC (1). The earliest assignment on record here is 2012-03-28 and the most recent 2021-07-21. 2 of them are in thousands-block pooling, so those prefixes are shared between carriers in 1,000-number lots.

3 assigned blocks – 0.6% of 435
2 holders of record
2 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
435-308 AT&T NEW CINGULAR WIRELESS PCS, LLC 2021-07-21 yes yes
435-316 NAVAJO COMM CO INC - UT DBA NAVAJO COMM UT 2012-03-28 yes yes
435-727 NAVAJO COMM CO INC - UT DBA NAVAJO COMM UT – 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
NAVAJO COMM CO INC - UT DBA NAVAJO COMM UT – 2 66.7%
NEW CINGULAR WIRELESS PCS, LLC AT&T 1 33.3%

Frequently asked

Which prefixes belong to MONUMNTVLY in area code 435?

3 blocks: 308, 316, 727. The table above gives the holder of each.

Which carriers have numbers in MONUMNTVLY?

NAVAJO COMM CO INC - UT DBA NAVAJO COMM UT (2 blocks), NEW CINGULAR WIRELESS PCS, 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 MONUMNTVLY 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