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

CARSONCITY prefixes in area code 989

NANPA records 3 assigned NXX blocks to rate center CARSONCITY in area code 989, 0.4% 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. 3 holders hold those blocks, the largest being ONVOY, LLCV - MI (1), FRONTIER NORTH, INC. - MI (1), INTERACTIVE SERVICES NETWORK, INC. (1). The earliest assignment on record here is 2001-11-14 and the most recent 2016-06-30. 2 of them are in thousands-block pooling, so those prefixes are shared between carriers in 1,000-number lots. The same rate center name also appears in area code 775 – overlay codes cover the same geography, so a rate center is served by all of them.

3 assigned blocks – 0.4% of 989
3 holders of record
2 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
989-338 Onvoy ONVOY, LLCV - MI 2016-06-30 yes yes
989-584 Frontier FRONTIER NORTH, INC. - MI – yes yes
989-905 INTERACTIVE SERVICES NETWORK, INC. 2001-11-14 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 1 33.3%
FRONTIER NORTH, INC. - MI Frontier 1 33.3%
INTERACTIVE SERVICES NETWORK, INC. – 1 33.3%

Same rate center in other codes

Overlay codes cover the same geography, so one rate center is served by all of them.

Frequently asked

Which prefixes belong to CARSONCITY in area code 989?

3 blocks: 338, 584, 905. The table above gives the holder of each.

Which carriers have numbers in CARSONCITY?

ONVOY, LLCV - MI (1 block), FRONTIER NORTH, INC. - MI (1 block), INTERACTIVE SERVICES NETWORK, INC. (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is CARSONCITY 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