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

NORTHBROOK prefixes in area code 630

NANPA records 33 assigned NXX blocks to rate center NORTHBROOK in area code 630, 4.2% of the 782 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 (26), T-MOBILE USA, INC. (7). 27 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 224, 312, 708, 815 – overlay codes cover the same geography, so a rate center is served by all of them.

33 assigned blocks – 4.2% of 630
2 holders of record
27 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
630-204 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL – no yes
630-205 T-Mobile T-MOBILE USA, INC. – yes yes
630-263 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL – no yes
630-302 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL – yes yes
630-309 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL – no yes
630-370 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL – yes yes
630-404 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL – no yes
630-421 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL – yes yes
630-459 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL – yes yes
630-479 T-Mobile T-MOBILE USA, INC. – yes yes
630-508 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL – yes yes
630-533 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL – yes yes
630-564 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL – yes yes
630-569 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL – yes yes
630-650 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL – no yes
630-651 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL – yes yes
630-669 T-Mobile T-MOBILE USA, INC. – yes yes
630-673 T-Mobile T-MOBILE USA, INC. – yes yes
630-674 T-Mobile T-MOBILE USA, INC. – yes yes
630-676 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL – yes yes
630-707 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL – no yes
630-721 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL – yes yes
630-732 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL – yes yes
630-745 T-Mobile T-MOBILE USA, INC. – yes yes
630-772 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL – yes yes
630-816 T-Mobile T-MOBILE USA, INC. – yes yes
630-817 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL – yes yes
630-843 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL – yes yes
630-939 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL – yes yes
630-951 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL – yes yes
630-975 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL – yes yes
630-989 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL – yes yes
630-992 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 26 78.8%
T-MOBILE USA, INC. T-Mobile 7 21.2%

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 NORTHBROOK in area code 630?

33 blocks: 204, 205, 263, 302, 309, 370, 404, 421, 459, 479, 508, 533 and 21 more, all listed in the table above.

Which carriers have numbers in NORTHBROOK?

CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL (26 blocks), T-MOBILE USA, INC. (7 blocks). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is NORTHBROOK 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 630

All 782 prefixes in 630