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

MARION prefixes in area code 220

NANPA records 3 assigned NXX blocks to rate center MARION in area code 220, 2.1% of the 142 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. 1 holder holds those blocks, the largest being ONVOY, LLC - OH (3). The earliest assignment on record here is 2021-04-02 and the most recent 2024-01-03. 3 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 codes 223, 231, 270, 276 – overlay codes cover the same geography, so a rate center is served by all of them.

3 assigned blocks – 2.1% of 220
1 holders of record
3 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
220-221 Onvoy ONVOY, LLC - OH 2021-04-02 yes yes
220-239 Onvoy ONVOY, LLC - OH 2022-11-02 yes yes
220-257 Onvoy ONVOY, LLC - OH 2024-01-03 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.

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 MARION in area code 220?

3 blocks: 221, 239, 257. The table above gives the holder of each.

Which carriers have numbers in MARION?

ONVOY, LLC - OH (3 blocks). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is MARION 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 220

All 142 prefixes in 220