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

EARLHAM prefixes in area code 515

NANPA records 3 assigned NXX blocks to rate center EARLHAM in area code 515, 0.5% of the 578 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 BANDWIDTH.COM CLEC, LLC - IA (2), QWEST CORPORATION (1). The earliest assignment on record here is 2015-06-09 and the most recent 2022-01-14. 3 of them are in thousands-block pooling, so those prefixes are shared between carriers in 1,000-number lots.

3 assigned blocks – 0.5% of 515
2 holders of record
3 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
515-377 Bandwidth BANDWIDTH.COM CLEC, LLC - IA 2022-01-14 yes yes
515-517 Bandwidth BANDWIDTH.COM CLEC, LLC - IA 2015-06-09 yes yes
515-758 Lumen QWEST CORPORATION – 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
BANDWIDTH.COM CLEC, LLC - IA Bandwidth 2 66.7%
QWEST CORPORATION Lumen 1 33.3%

Frequently asked

Which prefixes belong to EARLHAM in area code 515?

3 blocks: 377, 517, 758. The table above gives the holder of each.

Which carriers have numbers in EARLHAM?

BANDWIDTH.COM CLEC, LLC - IA (2 blocks), QWEST CORPORATION (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is EARLHAM 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 515

All 578 prefixes in 515