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

MONTICELLO prefixes in area code 435

NANPA records 4 assigned NXX blocks to rate center MONTICELLO in area code 435, 0.8% 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. 3 holders hold those blocks, the largest being CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT (2), E. FIBER SAN JUAN, LLC (1), CITIZENS TELECOM-UTAH DBA FRONTIER COMM OF UT (1). The earliest assignment on record here is 2021-11-24 and the most recent 2021-11-24. 3 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 217, 319, 329, 336 – overlay codes cover the same geography, so a rate center is served by all of them.

4 assigned blocks – 0.8% of 435
3 holders of record
3 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
435-298 E. FIBER SAN JUAN, LLC 2021-11-24 yes yes
435-419 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT – yes yes
435-459 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT – yes yes
435-587 Frontier CITIZENS TELECOM-UTAH DBA FRONTIER COMM OF 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
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT Verizon 2 50%
E. FIBER SAN JUAN, LLC – 1 25%
CITIZENS TELECOM-UTAH DBA FRONTIER COMM OF UT Frontier 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 MONTICELLO in area code 435?

4 blocks: 298, 419, 459, 587. The table above gives the holder of each.

Which carriers have numbers in MONTICELLO?

CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT (2 blocks), E. FIBER SAN JUAN, LLC (1 block), CITIZENS TELECOM-UTAH DBA FRONTIER COMM OF UT (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is MONTICELLO 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