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

LACONIA prefixes in area code 603

NANPA records 19 assigned NXX blocks to rate center LACONIA in area code 603, 2.5% of the 752 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 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH (5), BELL ATLANTIC MOBILE, INC (3), UNITED STATES CELLULAR - NH (2). The earliest assignment on record here is 2001-05-04 and the most recent 2023-08-11. 15 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 code 812 – overlay codes cover the same geography, so a rate center is served by all of them.

19 assigned blocks – 2.5% of 603
10 holders of record
15 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
603-273 Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH – yes yes
603-293 Consolidated CONSOLIDATED COMM OF NO. NEW ENGLAND-NH – yes yes
603-366 Consolidated CONSOLIDATED COMM OF NO. NEW ENGLAND-NH – yes yes
603-387 BELL ATLANTIC MOBILE, INC – no yes
603-393 UNITED STATES CELLULAR - NH 2001-05-04 yes yes
603-409 AT&T NEW CINGULAR WIRELESS PCS, LLC - DC 2015-10-13 yes yes
603-455 UNITED STATES CELLULAR - NH – yes yes
603-520 BELL ATLANTIC MOBILE, INC – no yes
603-524 Consolidated CONSOLIDATED COMM OF NO. NEW ENGLAND-NH – no yes
603-527 Consolidated CONSOLIDATED COMM OF NO. NEW ENGLAND-NH – yes yes
603-528 Consolidated CONSOLIDATED COMM OF NO. NEW ENGLAND-NH – no yes
603-556 Lumen LEVEL 3 COMMUNICATIONS, LLC - NH – yes yes
603-581 Windstream PAETEC ITEL, LLC – yes yes
603-619 Comcast COMCAST IP PHONE, LLC 2022-09-01 yes yes
603-630 BELL ATLANTIC MOBILE, INC 2002-01-22 yes yes
603-737 FREEDOM RING COMMUNICATIONS, LLC – yes yes
603-794 AT&T NEW CINGULAR WIRELESS PCS, LLC - DC 2023-08-11 yes yes
603-832 Windstream PAETEC ITEL, LLC – yes yes
603-998 T-Mobile METROPCS, INC. 2002-07-08 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
CONSOLIDATED COMM OF NO. NEW ENGLAND-NH Consolidated 5 26.3%
BELL ATLANTIC MOBILE, INC – 3 15.8%
UNITED STATES CELLULAR - NH – 2 10.5%
NEW CINGULAR WIRELESS PCS, LLC - DC AT&T 2 10.5%
PAETEC ITEL, LLC Windstream 2 10.5%
MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH Verizon 1 5.3%
LEVEL 3 COMMUNICATIONS, LLC - NH Lumen 1 5.3%
COMCAST IP PHONE, LLC Comcast 1 5.3%
FREEDOM RING COMMUNICATIONS, LLC – 1 5.3%
METROPCS, INC. T-Mobile 1 5.3%

Frequently asked

Which prefixes belong to LACONIA in area code 603?

19 blocks: 273, 293, 366, 387, 393, 409, 455, 520, 524, 527, 528, 556 and 7 more, all listed in the table above.

Which carriers have numbers in LACONIA?

CONSOLIDATED COMM OF NO. NEW ENGLAND-NH (5 blocks), BELL ATLANTIC MOBILE, INC (3 blocks), UNITED STATES CELLULAR - NH (2 blocks), NEW CINGULAR WIRELESS PCS, LLC - DC (2 blocks), PAETEC ITEL, LLC (2 blocks), MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is LACONIA 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 603

All 752 prefixes in 603