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

EVART prefixes in area code 231

NANPA records 6 assigned NXX blocks to rate center EVART in area code 231, 1.0% of the 572 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 INTERACTIVE SERVICES NETWORK, INC. (1), BANDWIDTH.COM CLEC, LLC - MI (1), ONVOY SPECTRUM, LLC (1). The earliest assignment on record here is 2002-08-27 and the most recent 2021-07-02. 3 of them are in thousands-block pooling, so those prefixes are shared between carriers in 1,000-number lots.

6 assigned blocks – 1% of 231
6 holders of record
3 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
231-372 INTERACTIVE SERVICES NETWORK, INC. – no yes
231-423 Bandwidth BANDWIDTH.COM CLEC, LLC - MI – no yes
231-466 Charter ONVOY SPECTRUM, LLC 2021-07-02 yes yes
231-515 ACD TELECOM, INC. - MI 2005-01-19 yes yes
231-734 AT&T MICHIGAN BELL TEL CO – yes yes
231-836 123.NET, LLC 2002-08-27 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
INTERACTIVE SERVICES NETWORK, INC. – 1 16.7%
BANDWIDTH.COM CLEC, LLC - MI Bandwidth 1 16.7%
ONVOY SPECTRUM, LLC Charter 1 16.7%
ACD TELECOM, INC. - MI – 1 16.7%
MICHIGAN BELL TEL CO AT&T 1 16.7%
123.NET, LLC – 1 16.7%

Frequently asked

Which prefixes belong to EVART in area code 231?

6 blocks: 372, 423, 466, 515, 734, 836. The table above gives the holder of each.

Which carriers have numbers in EVART?

INTERACTIVE SERVICES NETWORK, INC. (1 block), BANDWIDTH.COM CLEC, LLC - MI (1 block), ONVOY SPECTRUM, LLC (1 block), ACD TELECOM, INC. - MI (1 block), MICHIGAN BELL TEL CO (1 block), 123.NET, 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 EVART 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 231

All 572 prefixes in 231