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

BYRON CTR prefixes in area code 616

NANPA records 9 assigned NXX blocks to rate center BYRON CTR in area code 616, 1.7% of the 545 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 ONVOY, LLCV - MI (3), MICHIGAN BELL TEL CO (2), OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC (1). The earliest assignment on record here is 2004-04-21 and the most recent 2023-07-14. 8 of them are in thousands-block pooling, so those prefixes are shared between carriers in 1,000-number lots.

9 assigned blocks – 1.7% of 616
6 holders of record
8 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
616-217 T-Mobile OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2004-04-21 yes yes
616-277 INTERACTIVE SERVICES NETWORK, INC. 2004-11-17 yes yes
616-305 Onvoy ONVOY, LLCV - MI 2023-07-14 yes yes
616-345 Onvoy ONVOY, LLCV - MI – yes yes
616-366 Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI – yes yes
616-583 AT&T MICHIGAN BELL TEL CO – yes yes
616-626 Onvoy ONVOY, LLCV - MI – yes yes
616-730 Windstream PAETEC ITEL, LLC 2007-07-31 yes yes
616-878 AT&T MICHIGAN BELL TEL CO – 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
ONVOY, LLCV - MI Onvoy 3 33.3%
MICHIGAN BELL TEL CO AT&T 2 22.2%
OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC T-Mobile 1 11.1%
INTERACTIVE SERVICES NETWORK, INC. – 1 11.1%
MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI Verizon 1 11.1%
PAETEC ITEL, LLC Windstream 1 11.1%

Frequently asked

Which prefixes belong to BYRON CTR in area code 616?

9 blocks: 217, 277, 305, 345, 366, 583, 626, 730, 878. The table above gives the holder of each.

Which carriers have numbers in BYRON CTR?

ONVOY, LLCV - MI (3 blocks), MICHIGAN BELL TEL CO (2 blocks), OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC (1 block), INTERACTIVE SERVICES NETWORK, INC. (1 block), MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI (1 block), PAETEC ITEL, LLC (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is BYRON CTR 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 616

All 545 prefixes in 616