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

ZEPHYRHILS prefixes in area code 656

NANPA records 9 assigned NXX blocks to rate center ZEPHYRHILS in area code 656, 9.2% of the 98 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. 6 holders hold those blocks, the largest being ONVOY, LLC - FL (3), FRACTEL, LLC (2), HD CARRIER LLC (1). The earliest assignment on record here is 2021-12-22 and the most recent 2025-12-19. 8 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 813 – overlay codes cover the same geography, so a rate center is served by all of them.

9 assigned blocks – 9.2% of 656
6 holders of record
8 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
656-202 HD CARRIER LLC – yes yes
656-226 Onvoy ONVOY, LLC - FL 2023-08-18 yes yes
656-232 AT&T NEW CINGULAR WIRELESS PCS, LLC - GA 2024-02-09 yes yes
656-243 SHELCOMM 2024-09-11 no yes
656-249 Onvoy ONVOY, LLC - FL 2025-01-08 yes yes
656-261 IP HORIZON LLC 2025-04-30 yes yes
656-271 Onvoy ONVOY, LLC - FL 2025-12-19 yes yes
656-666 FRACTEL, LLC 2021-12-22 yes yes
656-900 FRACTEL, LLC 2022-03-03 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.

Who holds the blocks

HolderBrandBlocksShare here
ONVOY, LLC - FL Onvoy 3 33.3%
FRACTEL, LLC – 2 22.2%
HD CARRIER LLC – 1 11.1%
NEW CINGULAR WIRELESS PCS, LLC - GA AT&T 1 11.1%
SHELCOMM – 1 11.1%
IP HORIZON LLC – 1 11.1%

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 ZEPHYRHILS in area code 656?

9 blocks: 202, 226, 232, 243, 249, 261, 271, 666, 900. The table above gives the holder of each.

Which carriers have numbers in ZEPHYRHILS?

ONVOY, LLC - FL (3 blocks), FRACTEL, LLC (2 blocks), HD CARRIER LLC (1 block), NEW CINGULAR WIRELESS PCS, LLC - GA (1 block), SHELCOMM (1 block), IP HORIZON 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 ZEPHYRHILS 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 656

All 98 prefixes in 656