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

ST ROBERT prefixes in area code 573

NANPA records 4 assigned NXX blocks to rate center ST ROBERT in area code 573, 0.5% 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. 3 holders hold those blocks, the largest being EMBARQ MISSOURI, INC. DBA CENTURYLINK - MO (2), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO (1), FIDELITY CABLEVISION, LLC (1). The earliest assignment on record here is 2001-05-24 and the most recent 2002-06-06. 3 of them are in thousands-block pooling, so those prefixes are shared between carriers in 1,000-number lots.

4 assigned blocks – 0.5% of 573
3 holders of record
3 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
573-232 Lumen EMBARQ MISSOURI, INC. DBA CENTURYLINK - MO 2001-05-24 yes yes
573-336 Lumen EMBARQ MISSOURI, INC. DBA CENTURYLINK - MO – no yes
573-337 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO – yes yes
573-451 Altice FIDELITY CABLEVISION, LLC 2002-06-06 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
EMBARQ MISSOURI, INC. DBA CENTURYLINK - MO Lumen 2 50%
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO Verizon 1 25%
FIDELITY CABLEVISION, LLC Altice 1 25%

Frequently asked

Which prefixes belong to ST ROBERT in area code 573?

4 blocks: 232, 336, 337, 451. The table above gives the holder of each.

Which carriers have numbers in ST ROBERT?

EMBARQ MISSOURI, INC. DBA CENTURYLINK - MO (2 blocks), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO (1 block), FIDELITY CABLEVISION, 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 ST ROBERT 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