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

SHELDON prefixes in area code 346

NANPA records 3 assigned NXX blocks to rate center SHELDON in area code 346, 0.4% of the 752 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 - TX (3). The earliest assignment on record here is 2016-05-11 and the most recent 2021-07-20. 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 281, 417, 701, 712 – overlay codes cover the same geography, so a rate center is served by all of them.

3 assigned blocks – 0.4% of 346
1 holders of record
3 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
346-258 Onvoy ONVOY, LLC - TX 2016-05-11 yes yes
346-362 Onvoy ONVOY, LLC - TX 2018-08-30 yes yes
346-484 Onvoy ONVOY, LLC - TX 2021-07-20 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 SHELDON in area code 346?

3 blocks: 258, 362, 484. The table above gives the holder of each.

Which carriers have numbers in SHELDON?

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

Is SHELDON 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 346

All 752 prefixes in 346