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

GRAVOIS ML prefixes in area code 573

NANPA records 5 assigned NXX blocks to rate center GRAVOIS ML in area code 573, 0.6% of the 786 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 SOUTHWESTERN BELL (2), LEVEL 3 COMMUNICATIONS, LLC - MO (1), CHARTER IP ENABLED SERVICES, LLC (1). The earliest assignment on record here is 2003-01-09 and the most recent 2014-05-07. 4 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 235 – overlay codes cover the same geography, so a rate center is served by all of them.

5 assigned blocks – 0.6% of 573
4 holders of record
4 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
573-207 Lumen LEVEL 3 COMMUNICATIONS, LLC - MO 2003-01-09 yes yes
573-372 AT&T SOUTHWESTERN BELL – yes yes
573-374 AT&T SOUTHWESTERN BELL – no yes
573-502 Charter CHARTER IP ENABLED SERVICES, LLC 2014-05-07 yes yes
573-505 Bandwidth BANDWIDTH.COM CLEC, LLC - MO 2014-05-01 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
SOUTHWESTERN BELL AT&T 2 40%
LEVEL 3 COMMUNICATIONS, LLC - MO Lumen 1 20%
CHARTER IP ENABLED SERVICES, LLC Charter 1 20%
BANDWIDTH.COM CLEC, LLC - MO Bandwidth 1 20%

Frequently asked

Which prefixes belong to GRAVOIS ML in area code 573?

5 blocks: 207, 372, 374, 502, 505. The table above gives the holder of each.

Which carriers have numbers in GRAVOIS ML?

SOUTHWESTERN BELL (2 blocks), LEVEL 3 COMMUNICATIONS, LLC - MO (1 block), CHARTER IP ENABLED SERVICES, LLC (1 block), BANDWIDTH.COM CLEC, LLC - MO (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is GRAVOIS ML 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 573

All 786 prefixes in 573