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

WILLIAMSBG prefixes in area code 319

NANPA records 4 assigned NXX blocks to rate center WILLIAMSBG in area code 319, 0.7% of the 565 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 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA (2), WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH (2). The earliest assignment on record here is 2015-06-25 and the most recent 2015-06-25. 4 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 231, 283, 413, 513 – overlay codes cover the same geography, so a rate center is served by all of them.

4 assigned blocks – 0.7% of 319
2 holders of record
4 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
319-660 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA – yes yes
319-661 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA – yes yes
319-668 Windstream WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH – yes yes
319-722 Windstream WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 2015-06-25 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
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA Verizon 2 50%
WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH Windstream 2 50%

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 WILLIAMSBG in area code 319?

4 blocks: 660, 661, 668, 722. The table above gives the holder of each.

Which carriers have numbers in WILLIAMSBG?

CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA (2 blocks), WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH (2 blocks). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is WILLIAMSBG 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 319

All 565 prefixes in 319