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

OAKLAND prefixes in area code 301

NANPA records 8 assigned NXX blocks to rate center OAKLAND in area code 301, 1.0% 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. 6 holders hold those blocks, the largest being VERIZON MARYLAND, INC. (3), NEW CINGULAR WIRELESS PCS, LLC - DC (1), USCOC OF CUMBERLAND, INC. DBA UNITED STATES CEL MD (1). The earliest assignment on record here is 2002-01-09 and the most recent 2012-12-27. 6 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 201, 207, 217, 227 – overlay codes cover the same geography, so a rate center is served by all of them.

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

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
301-334 Verizon VERIZON MARYLAND, INC. – no yes
301-387 Verizon VERIZON MARYLAND, INC. – yes yes
301-501 AT&T NEW CINGULAR WIRELESS PCS, LLC - DC – yes yes
301-533 Verizon VERIZON MARYLAND, INC. – yes yes
301-616 UScellular USCOC OF CUMBERLAND, INC. DBA UNITED STATES CEL MD – yes yes
301-849 Bandwidth BANDWIDTH.COM CLEC, LLC - MD – no yes
301-859 Lumen LEVEL 3 COMMUNICATIONS, LLC - MD 2002-01-09 yes yes
301-914 MOUNTAIN COMMUNICATIONS, LLC DBA PROCOM - MD 2012-12-27 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 3 37.5%
NEW CINGULAR WIRELESS PCS, LLC - DC AT&T 1 12.5%
USCOC OF CUMBERLAND, INC. DBA UNITED STATES CEL MD UScellular 1 12.5%
BANDWIDTH.COM CLEC, LLC - MD Bandwidth 1 12.5%
LEVEL 3 COMMUNICATIONS, LLC - MD Lumen 1 12.5%
MOUNTAIN COMMUNICATIONS, LLC DBA PROCOM - MD – 1 12.5%

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 OAKLAND in area code 301?

8 blocks: 334, 387, 501, 533, 616, 849, 859, 914. The table above gives the holder of each.

Which carriers have numbers in OAKLAND?

VERIZON MARYLAND, INC. (3 blocks), NEW CINGULAR WIRELESS PCS, LLC - DC (1 block), USCOC OF CUMBERLAND, INC. DBA UNITED STATES CEL MD (1 block), BANDWIDTH.COM CLEC, LLC - MD (1 block), LEVEL 3 COMMUNICATIONS, LLC - MD (1 block), MOUNTAIN COMMUNICATIONS, LLC DBA PROCOM - 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 OAKLAND 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