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

COCKEYSVL prefixes in area code 410

NANPA records 16 assigned NXX blocks to rate center COCKEYSVL in area code 410, 2.0% 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. 4 holders hold those blocks, the largest being VERIZON MARYLAND, INC. (12), MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD (2), PAETEC ITEL, LLC (1). 10 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.

16 assigned blocks – 2% of 410
4 holders of record
10 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
410-229 Verizon VERIZON MARYLAND, INC. – no yes
410-316 Verizon VERIZON MARYLAND, INC. – yes yes
410-329 Verizon VERIZON MARYLAND, INC. – yes yes
410-403 Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD – yes yes
410-498 Windstream PAETEC ITEL, LLC – yes yes
410-527 Verizon VERIZON MARYLAND, INC. – no yes
410-568 AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - MD – yes yes
410-584 Verizon VERIZON MARYLAND, INC. – yes yes
410-628 Verizon VERIZON MARYLAND, INC. – yes yes
410-666 Verizon VERIZON MARYLAND, INC. – no yes
410-667 Verizon VERIZON MARYLAND, INC. – no yes
410-683 Verizon VERIZON MARYLAND, INC. – yes yes
410-771 Verizon VERIZON MARYLAND, INC. – no yes
410-773 Verizon VERIZON MARYLAND, INC. – yes yes
410-785 Verizon VERIZON MARYLAND, INC. – no yes
410-891 Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD – 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 12 75%
MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD Verizon 2 12.5%
PAETEC ITEL, LLC Windstream 1 6.2%
TELEPORT COMMUNICATIONS AMERICA, LLC - MD AT&T 1 6.2%

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 COCKEYSVL in area code 410?

16 blocks: 229, 316, 329, 403, 498, 527, 568, 584, 628, 666, 667, 683 and 4 more, all listed in the table above.

Which carriers have numbers in COCKEYSVL?

VERIZON MARYLAND, INC. (12 blocks), MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD (2 blocks), PAETEC ITEL, LLC (1 block), TELEPORT COMMUNICATIONS AMERICA, 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 COCKEYSVL 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