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

BROWN CITY prefixes in area code 810

NANPA records 4 assigned NXX blocks to rate center BROWN CITY in area code 810, 0.8% of the 509 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 - MI (2), FRONTIER NORTH, INC. - MI (1), TELEPORT COMMUNICATIONS AMERICA, LLC - MI (1). The earliest assignment on record here is 2001-10-18 and the most recent 2001-10-18. 3 of them are in thousands-block pooling, so those prefixes are shared between carriers in 1,000-number lots.

4 assigned blocks – 0.8% of 810
3 holders of record
3 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
810-346 Frontier FRONTIER NORTH, INC. - MI – yes yes
810-475 AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - MI – yes yes
810-705 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI – no yes
810-886 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 2001-10-18 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 - MI Verizon 2 50%
FRONTIER NORTH, INC. - MI Frontier 1 25%
TELEPORT COMMUNICATIONS AMERICA, LLC - MI AT&T 1 25%

Frequently asked

Which prefixes belong to BROWN CITY in area code 810?

4 blocks: 346, 475, 705, 886. The table above gives the holder of each.

Which carriers have numbers in BROWN CITY?

CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI (2 blocks), FRONTIER NORTH, INC. - MI (1 block), TELEPORT COMMUNICATIONS AMERICA, LLC - MI (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is BROWN CITY 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 810

All 509 prefixes in 810