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

NEWCASTLE prefixes in area code 307

NANPA records 6 assigned NXX blocks to rate center NEWCASTLE in area code 307, 1.2% of the 499 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. 4 holders hold those blocks, the largest being RT COMMUNICATIONS (2), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY (2), NEW CINGULAR WIRELESS PCS, LLC (1). The earliest assignment on record here is 2002-12-27 and the most recent 2004-12-21. 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 402, 405, 940 – overlay codes cover the same geography, so a rate center is served by all of them.

6 assigned blocks – 1.2% of 307
4 holders of record
4 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
307-465 RT COMMUNICATIONS – no yes
307-629 AT&T NEW CINGULAR WIRELESS PCS, LLC 2004-12-21 yes yes
307-744 UNION TELEPHONE COMPANY 2002-12-27 no yes
307-746 RT COMMUNICATIONS – yes yes
307-941 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY – yes yes
307-949 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY – 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
RT COMMUNICATIONS – 2 33.3%
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY Verizon 2 33.3%
NEW CINGULAR WIRELESS PCS, LLC AT&T 1 16.7%
UNION TELEPHONE COMPANY – 1 16.7%

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 NEWCASTLE in area code 307?

6 blocks: 465, 629, 744, 746, 941, 949. The table above gives the holder of each.

Which carriers have numbers in NEWCASTLE?

RT COMMUNICATIONS (2 blocks), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY (2 blocks), NEW CINGULAR WIRELESS PCS, LLC (1 block), UNION TELEPHONE COMPANY (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is NEWCASTLE 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 307

All 499 prefixes in 307