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

SLATER prefixes in area code 515

NANPA records 3 assigned NXX blocks to rate center SLATER 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 WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH (2), HUXLEY COMMUNICATIONS COOPERATIVE - IA (1). The earliest assignment on record here is 2001-09-26 and the most recent 2018-01-31. 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 code 660 – overlay codes cover the same geography, so a rate center is served by all of them.

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
515-228 HUXLEY COMMUNICATIONS COOPERATIVE - IA 2001-09-26 yes yes
515-579 Windstream WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 2018-01-31 yes yes
515-685 Windstream WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH – 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
WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH Windstream 2 66.7%
HUXLEY COMMUNICATIONS COOPERATIVE - IA – 1 33.3%

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 SLATER in area code 515?

3 blocks: 228, 579, 685. The table above gives the holder of each.

Which carriers have numbers in SLATER?

WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH (2 blocks), HUXLEY COMMUNICATIONS COOPERATIVE - IA (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is SLATER 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