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

ELKRIDGE prefixes in area code 410

NANPA records 20 assigned NXX blocks to rate center ELKRIDGE in area code 410, 2.6% of the 783 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. (9), SPOK, INC. (5), METROPCS, INC. (3). The earliest assignment on record here is 2004-07-15 and the most recent 2011-09-30. 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 443, 667 – overlay codes cover the same geography, so a rate center is served by all of them.

20 assigned blocks – 2.6% of 410
6 holders of record
8 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
410-220 T-Mobile METROPCS, INC. 2011-09-30 yes yes
410-300 T-Mobile METROPCS, INC. 2004-07-15 yes yes
410-331 Spok SPOK, INC. – no yes
410-379 Verizon VERIZON MARYLAND, INC. – no yes
410-407 Verizon VERIZON MARYLAND, INC. – no yes
410-460 Spok SPOK, INC. – no yes
410-471 Verizon VERIZON MARYLAND, INC. – no yes
410-503 Verizon VERIZON MARYLAND, INC. – no yes
410-540 Verizon VERIZON MARYLAND, INC. – no yes
410-564 AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - MD – yes yes
410-567 Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD – yes yes
410-579 Verizon VERIZON MARYLAND, INC. – no yes
410-660 T-Mobile METROPCS, INC. 2006-07-31 yes yes
410-678 Spok SPOK, INC. – no yes
410-712 Verizon VERIZON MARYLAND, INC. – no yes
410-717 Lumen LEVEL 3 TELECOM OF MARYLAND, LLC - MD – yes yes
410-782 Verizon VERIZON MARYLAND, INC. – yes yes
410-796 Verizon VERIZON MARYLAND, INC. – yes yes
410-909 Spok SPOK, INC. – no yes
410-932 Spok SPOK, INC. – 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
VERIZON MARYLAND, INC. Verizon 9 45%
SPOK, INC. Spok 5 25%
METROPCS, INC. T-Mobile 3 15%
TELEPORT COMMUNICATIONS AMERICA, LLC - MD AT&T 1 5%
MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD Verizon 1 5%
LEVEL 3 TELECOM OF MARYLAND, LLC - MD Lumen 1 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 ELKRIDGE in area code 410?

20 blocks: 220, 300, 331, 379, 407, 460, 471, 503, 540, 564, 567, 579 and 8 more, all listed in the table above.

Which carriers have numbers in ELKRIDGE?

VERIZON MARYLAND, INC. (9 blocks), SPOK, INC. (5 blocks), METROPCS, INC. (3 blocks), TELEPORT COMMUNICATIONS AMERICA, LLC - MD (1 block), MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD (1 block), LEVEL 3 TELECOM OF MARYLAND, 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 ELKRIDGE 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 410

All 783 prefixes in 410