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

ROCK HILL prefixes in area code 803

NANPA records 42 assigned NXX blocks to rate center ROCK HILL in area code 803, 5.4% 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. 5 holders hold those blocks, the largest being COMPORIUM, INC. (15), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SC (12), SUNCOM DBA T-MOBILE USA (7). The earliest assignment on record here is 2001-01-18 and the most recent 2021-03-08. 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 code 839 – overlay codes cover the same geography, so a rate center is served by all of them.

42 assigned blocks – 5.4% of 803
5 holders of record
27 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
803-203 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SC 2017-08-25 yes yes
803-207 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SC 2007-01-09 yes yes
803-230 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SC – no yes
803-242 T-Mobile SUNCOM DBA T-MOBILE USA – yes yes
803-280 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SC – yes yes
803-322 AT&T NEW CINGULAR WIRELESS PCS, LLC - GA – no yes
803-323 COMPORIUM, INC. – yes yes
803-324 COMPORIUM, INC. – no yes
803-325 COMPORIUM, INC. – yes yes
803-326 COMPORIUM, INC. – no yes
803-327 COMPORIUM, INC. – no yes
803-328 COMPORIUM, INC. – no yes
803-329 COMPORIUM, INC. – no yes
803-366 COMPORIUM, INC. – no yes
803-367 COMPORIUM, INC. – yes yes
803-370 T-Mobile SUNCOM DBA T-MOBILE USA – yes yes
803-371 T-Mobile SUNCOM DBA T-MOBILE USA – yes yes
803-372 COMPORIUM, INC. – yes yes
803-389 AT&T NEW CINGULAR WIRELESS PCS, LLC - GA 2002-03-21 yes yes
803-412 AT&T NEW CINGULAR WIRELESS PCS, LLC - GA 2006-08-30 yes yes
803-415 T-Mobile SUNCOM DBA T-MOBILE USA 2009-02-18 yes yes
803-417 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SC – yes yes
803-448 AT&T NEW CINGULAR WIRELESS PCS, LLC - GA – no yes
803-487 AT&T NEW CINGULAR WIRELESS PCS, LLC - GA 2001-01-18 no yes
803-493 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SC – yes yes
803-504 T-Mobile SUNCOM DBA T-MOBILE USA 2012-10-10 yes yes
803-517 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SC – no yes
803-524 T-Mobile SUNCOM DBA T-MOBILE USA – yes yes
803-554 AT&T NEW CINGULAR WIRELESS PCS, LLC - GA 2005-11-03 yes yes
803-558 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SC 2020-04-08 yes yes
803-579 T-Mobile SUNCOM DBA T-MOBILE USA 2009-11-06 yes yes
803-616 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SC – yes yes
803-659 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SC 2018-06-11 yes yes
803-817 COMPORIUM, INC. – yes yes
803-833 SOUTH CAROLINA TELECOMM GRP HOLDINGS, LLC - SC 2016-12-09 yes yes
803-909 COMPORIUM, INC. – no yes
803-970 AT&T NEW CINGULAR WIRELESS PCS, LLC - GA 2021-03-08 yes yes
803-980 COMPORIUM, INC. – no yes
803-981 COMPORIUM, INC. – yes yes
803-984 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SC – no yes
803-985 COMPORIUM, INC. – no yes
803-992 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SC 2015-10-09 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
COMPORIUM, INC. – 15 35.7%
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SC Verizon 12 28.6%
SUNCOM DBA T-MOBILE USA T-Mobile 7 16.7%
NEW CINGULAR WIRELESS PCS, LLC - GA AT&T 7 16.7%
SOUTH CAROLINA TELECOMM GRP HOLDINGS, LLC - SC – 1 2.4%

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 ROCK HILL in area code 803?

42 blocks: 203, 207, 230, 242, 280, 322, 323, 324, 325, 326, 327, 328 and 30 more, all listed in the table above.

Which carriers have numbers in ROCK HILL?

COMPORIUM, INC. (15 blocks), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SC (12 blocks), SUNCOM DBA T-MOBILE USA (7 blocks), NEW CINGULAR WIRELESS PCS, LLC - GA (7 blocks), SOUTH CAROLINA TELECOMM GRP HOLDINGS, LLC - SC (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is ROCK HILL 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 803

All 784 prefixes in 803