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

LA GRANGE prefixes in area code 312

NANPA records 8 assigned NXX blocks to rate center LA GRANGE in area code 312, 1.0% of the 784 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 - IL (5), SPOK, INC. (3). 5 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 252, 307, 464, 502 – overlay codes cover the same geography, so a rate center is served by all of them.

8 assigned blocks – 1% of 312
2 holders of record
5 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
312-295 Spok SPOK, INC. – no yes
312-318 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL – yes yes
312-367 Spok SPOK, INC. – no yes
312-403 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL – yes yes
312-501 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL – yes yes
312-717 Spok SPOK, INC. – no yes
312-968 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL – yes yes
312-969 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL – 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 - IL Verizon 5 62.5%
SPOK, INC. Spok 3 37.5%

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 LA GRANGE in area code 312?

8 blocks: 295, 318, 367, 403, 501, 717, 968, 969. The table above gives the holder of each.

Which carriers have numbers in LA GRANGE?

CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL (5 blocks), SPOK, INC. (3 blocks). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is LA GRANGE 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 312

All 784 prefixes in 312