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

CLEAR LAKE prefixes in area code 641

NANPA records 6 assigned NXX blocks to rate center CLEAR LAKE in area code 641, 1.0% of the 584 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. 3 holders hold those blocks, the largest being CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA (3), CLEAR LAKE INDEPENDENT TEL. CO. (2), MCC TELEPHONY OF IOWA, LLC - IA (1). The earliest assignment on record here is 2001-08-09 and the most recent 2007-02-14. 5 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 320, 605, 715 – overlay codes cover the same geography, so a rate center is served by all of them.

6 assigned blocks – 1% of 641
3 holders of record
5 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
641-231 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 2001-08-09 yes yes
641-355 CLEAR LAKE INDEPENDENT TEL. CO. – yes yes
641-357 CLEAR LAKE INDEPENDENT TEL. CO. – no yes
641-440 MCC TELEPHONY OF IOWA, LLC - IA 2007-02-14 yes yes
641-525 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA – yes yes
641-529 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA – 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
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA Verizon 3 50%
CLEAR LAKE INDEPENDENT TEL. CO. – 2 33.3%
MCC TELEPHONY OF IOWA, LLC - IA – 1 16.7%

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 CLEAR LAKE in area code 641?

6 blocks: 231, 355, 357, 440, 525, 529. The table above gives the holder of each.

Which carriers have numbers in CLEAR LAKE?

CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA (3 blocks), CLEAR LAKE INDEPENDENT TEL. CO. (2 blocks), MCC TELEPHONY OF IOWA, LLC - IA (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is CLEAR LAKE 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 641

All 584 prefixes in 641