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

CUMBERLAND prefixes in area code 301

NANPA records 14 assigned NXX blocks to rate center CUMBERLAND in area code 301, 1.8% 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. 7 holders hold those blocks, the largest being VERIZON MARYLAND, INC. (7), USCOC OF CUMBERLAND, INC. DBA UNITED STATES CEL MD (2), IDT AMERICA, CORP. - MD (1). The earliest assignment on record here is 2002-05-02 and the most recent 2019-05-28. 8 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 207, 227, 240, 317 – overlay codes cover the same geography, so a rate center is served by all of them.

14 assigned blocks – 1.8% of 301
7 holders of record
8 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
301-268 UScellular USCOC OF CUMBERLAND, INC. DBA UNITED STATES CEL MD – yes yes
301-338 IDT AMERICA, CORP. - MD 2006-01-31 yes yes
301-697 AT&T NEW CINGULAR WIRELESS PCS, LLC - DC – no yes
301-707 UScellular USCOC OF CUMBERLAND, INC. DBA UNITED STATES CEL MD – yes yes
301-709 CSC WIRELESS, LLC 2019-05-28 yes yes
301-722 Verizon VERIZON MARYLAND, INC. – no yes
301-723 Verizon VERIZON MARYLAND, INC. – yes yes
301-724 Verizon VERIZON MARYLAND, INC. – no yes
301-729 Verizon VERIZON MARYLAND, INC. – no yes
301-759 Verizon VERIZON MARYLAND, INC. – no yes
301-777 Verizon VERIZON MARYLAND, INC. – yes yes
301-783 Bandwidth BANDWIDTH.COM CLEC, LLC - MD – no yes
301-784 Verizon VERIZON MARYLAND, INC. – yes yes
301-876 Lumen LEVEL 3 COMMUNICATIONS, LLC - MD 2002-05-02 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
VERIZON MARYLAND, INC. Verizon 7 50%
USCOC OF CUMBERLAND, INC. DBA UNITED STATES CEL MD UScellular 2 14.3%
IDT AMERICA, CORP. - MD – 1 7.1%
NEW CINGULAR WIRELESS PCS, LLC - DC AT&T 1 7.1%
CSC WIRELESS, LLC – 1 7.1%
BANDWIDTH.COM CLEC, LLC - MD Bandwidth 1 7.1%
LEVEL 3 COMMUNICATIONS, LLC - MD Lumen 1 7.1%

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 CUMBERLAND in area code 301?

14 blocks: 268, 338, 697, 707, 709, 722, 723, 724, 729, 759, 777, 783 and 2 more, all listed in the table above.

Which carriers have numbers in CUMBERLAND?

VERIZON MARYLAND, INC. (7 blocks), USCOC OF CUMBERLAND, INC. DBA UNITED STATES CEL MD (2 blocks), IDT AMERICA, CORP. - MD (1 block), NEW CINGULAR WIRELESS PCS, LLC - DC (1 block), CSC WIRELESS, LLC (1 block), BANDWIDTH.COM CLEC, LLC - MD (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is CUMBERLAND 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 301

All 784 prefixes in 301