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

SEBEWAING prefixes in area code 989

NANPA records 4 assigned NXX blocks to rate center SEBEWAING in area code 989, 0.6% of the 723 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. 4 holders hold those blocks, the largest being INTERACTIVE SERVICES NETWORK, INC. (1), ONVOY, LLCV - MI (1), MICHIGAN BELL TEL CO (1). The earliest assignment on record here is 2001-11-14 and the most recent 2001-11-14. 3 of them are in thousands-block pooling, so those prefixes are shared between carriers in 1,000-number lots.

4 assigned blocks – 0.6% of 989
4 holders of record
3 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
989-617 INTERACTIVE SERVICES NETWORK, INC. 2001-11-14 no yes
989-704 Onvoy ONVOY, LLCV - MI – yes yes
989-883 AT&T MICHIGAN BELL TEL CO – yes yes
989-977 AT&T NEW CINGULAR WIRELESS PCS, LLC - IL – 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
INTERACTIVE SERVICES NETWORK, INC. – 1 25%
ONVOY, LLCV - MI Onvoy 1 25%
MICHIGAN BELL TEL CO AT&T 1 25%
NEW CINGULAR WIRELESS PCS, LLC - IL AT&T 1 25%

Frequently asked

Which prefixes belong to SEBEWAING in area code 989?

4 blocks: 617, 704, 883, 977. The table above gives the holder of each.

Which carriers have numbers in SEBEWAING?

INTERACTIVE SERVICES NETWORK, INC. (1 block), ONVOY, LLCV - MI (1 block), MICHIGAN BELL TEL CO (1 block), NEW CINGULAR WIRELESS PCS, LLC - IL (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is SEBEWAING 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 989

All 723 prefixes in 989