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

ANNAPOLIS prefixes in area code 443

NANPA records 39 assigned NXX blocks to rate center ANNAPOLIS in area code 443, 5.0% of the 785 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. 10 holders hold those blocks, the largest being NEW CINGULAR WIRELESS PCS, LLC - DC (9), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD (7), OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC (5). The earliest assignment on record here is 2001-01-15 and the most recent 2014-10-08. 32 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 410, 573, 618, 667 – overlay codes cover the same geography, so a rate center is served by all of them.

39 assigned blocks – 5% of 443
10 holders of record
32 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
443-214 AT&T NEW CINGULAR WIRELESS PCS, LLC - DC 2011-10-11 yes yes
443-217 CORE COMMUNICATIONS, INC.- MD – no yes
443-221 Lumen LEVEL 3 COMMUNICATIONS, LLC - MD – yes yes
443-223 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD – no yes
443-254 T-Mobile OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC – no yes
443-321 Windstream PAETEC ITEL, LLC – no yes
443-333 AT&T NEW CINGULAR WIRELESS PCS, LLC - DC 2009-02-13 yes yes
443-336 T-Mobile OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC – yes yes
443-370 AT&T NEW CINGULAR WIRELESS PCS, LLC - DC – yes yes
443-433 Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC 2001-02-21 yes yes
443-440 Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC – yes yes
443-454 T-Mobile OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC – yes yes
443-458 Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC – yes yes
443-476 Verizon VERIZON MARYLAND, INC. – no yes
443-481 Windstream PAETEC ITEL, LLC – yes yes
443-482 Verizon VERIZON MARYLAND, INC. – yes yes
443-510 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 2007-12-04 yes yes
443-534 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 2001-01-15 yes yes
443-569 Lumen LEVEL 3 COMMUNICATIONS, LLC - MD – yes yes
443-603 Windstream PAETEC ITEL, LLC – yes yes
443-699 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 2011-08-10 yes yes
443-714 AT&T NEW CINGULAR WIRELESS PCS, LLC - DC – yes yes
443-716 Windstream PAETEC ITEL, LLC – yes yes
443-758 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD – yes yes
443-775 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 2014-10-08 yes yes
443-782 Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC – yes yes
443-808 Bandwidth BANDWIDTH.COM CLEC, LLC - MD 2014-04-04 yes yes
443-822 T-Mobile OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC – yes yes
443-837 Windstream PAETEC ITEL, LLC 2001-09-24 yes yes
443-852 AT&T NEW CINGULAR WIRELESS PCS, LLC - DC 2001-08-21 yes yes
443-871 T-Mobile OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC – yes yes
443-875 AT&T NEW CINGULAR WIRELESS PCS, LLC - DC – yes yes
443-905 AT&T NEW CINGULAR WIRELESS PCS, LLC - DC – yes yes
443-924 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 2009-07-06 yes yes
443-926 Lumen LEVEL 3 COMMUNICATIONS, LLC - MD – yes yes
443-949 Comcast COMCAST IP PHONE, LLC 2006-06-28 yes yes
443-951 Lumen LEVEL 3 COMMUNICATIONS, LLC - MD – yes yes
443-994 AT&T NEW CINGULAR WIRELESS PCS, LLC - DC – no yes
443-995 AT&T NEW CINGULAR WIRELESS PCS, LLC - DC – no 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
NEW CINGULAR WIRELESS PCS, LLC - DC AT&T 9 23.1%
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD Verizon 7 17.9%
OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC T-Mobile 5 12.8%
PAETEC ITEL, LLC Windstream 5 12.8%
LEVEL 3 COMMUNICATIONS, LLC - MD Lumen 4 10.3%
MCIMETRO ACCESS TRANSMISSION SERVICES LLC Verizon 4 10.3%
VERIZON MARYLAND, INC. Verizon 2 5.1%
CORE COMMUNICATIONS, INC.- MD – 1 2.6%
BANDWIDTH.COM CLEC, LLC - MD Bandwidth 1 2.6%
COMCAST IP PHONE, LLC Comcast 1 2.6%

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 ANNAPOLIS in area code 443?

39 blocks: 214, 217, 221, 223, 254, 321, 333, 336, 370, 433, 440, 454 and 27 more, all listed in the table above.

Which carriers have numbers in ANNAPOLIS?

NEW CINGULAR WIRELESS PCS, LLC - DC (9 blocks), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD (7 blocks), OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC (5 blocks), PAETEC ITEL, LLC (5 blocks), LEVEL 3 COMMUNICATIONS, LLC - MD (4 blocks), MCIMETRO ACCESS TRANSMISSION SERVICES LLC (4 blocks). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is ANNAPOLIS 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 443

All 785 prefixes in 443