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

BUFFALOCTR prefixes in area code 641

NANPA records 3 assigned NXX blocks to rate center BUFFALOCTR in area code 641, 0.5% 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. 2 holders hold those blocks, the largest being WINNEBAGO COOP. TEL. ASSN. - IA (2), MCC TELEPHONY OF IOWA, LLC - IA (1). The earliest assignment on record here is 2007-02-14 and the most recent 2007-02-14. 1 of them are in thousands-block pooling, so those prefixes are shared between carriers in 1,000-number lots.

3 assigned blocks – 0.5% of 641
2 holders of record
1 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
641-561 WINNEBAGO COOP. TEL. ASSN. - IA – no yes
641-562 WINNEBAGO COOP. TEL. ASSN. - IA – no yes
641-735 MCC TELEPHONY OF IOWA, LLC - IA 2007-02-14 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
WINNEBAGO COOP. TEL. ASSN. - IA – 2 66.7%
MCC TELEPHONY OF IOWA, LLC - IA – 1 33.3%

Frequently asked

Which prefixes belong to BUFFALOCTR in area code 641?

3 blocks: 561, 562, 735. The table above gives the holder of each.

Which carriers have numbers in BUFFALOCTR?

WINNEBAGO COOP. TEL. ASSN. - IA (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 BUFFALOCTR 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