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

CALDWELL prefixes in area code 208

NANPA records 10 assigned NXX blocks to rate center CALDWELL in area code 208, 1.3% 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 QWEST CORPORATION (4), ONVOY, LLC - ID (2), LEVEL 3 TELECOM OF IDAHO, LLC - ID (2). The earliest assignment on record here is 2001-10-04 and the most recent 2016-02-18. 7 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 201, 620, 740, 862 – overlay codes cover the same geography, so a rate center is served by all of them.

10 assigned blocks – 1.3% of 208
5 holders of record
7 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
208-402 Windstream PAETEC ITEL, LLC – yes yes
208-453 Lumen QWEST CORPORATION – yes yes
208-454 Lumen QWEST CORPORATION – no yes
208-455 Lumen QWEST CORPORATION – no yes
208-459 Lumen QWEST CORPORATION – no yes
208-504 Onvoy ONVOY, LLC - ID 2016-02-18 yes yes
208-614 Lumen LEVEL 3 TELECOM OF IDAHO, LLC - ID 2014-08-11 yes yes
208-649 Lumen LEVEL 3 TELECOM OF IDAHO, LLC - ID 2002-04-04 yes yes
208-779 Onvoy ONVOY, LLC - ID 2003-06-09 yes yes
208-795 Allstream ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 2001-10-04 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
QWEST CORPORATION Lumen 4 40%
ONVOY, LLC - ID Onvoy 2 20%
LEVEL 3 TELECOM OF IDAHO, LLC - ID Lumen 2 20%
PAETEC ITEL, LLC Windstream 1 10%
ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM Allstream 1 10%

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 CALDWELL in area code 208?

10 blocks: 402, 453, 454, 455, 459, 504, 614, 649, 779, 795. The table above gives the holder of each.

Which carriers have numbers in CALDWELL?

QWEST CORPORATION (4 blocks), ONVOY, LLC - ID (2 blocks), LEVEL 3 TELECOM OF IDAHO, LLC - ID (2 blocks), PAETEC ITEL, LLC (1 block), ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is CALDWELL 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 208

All 785 prefixes in 208