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

WINCHESTER prefixes in area code 217

NANPA records 3 assigned NXX blocks to rate center WINCHESTER in area code 217, 0.4% 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. 2 holders hold those blocks, the largest being NEW CINGULAR WIRELESS PCS, LLC - IL (2), FRONTIER NORTH, INC. - IL (1). The earliest assignment on record here is 2009-09-21 and the most recent 2020-10-14. 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 447, 540, 603, 765 – overlay codes cover the same geography, so a rate center is served by all of them.

3 assigned blocks – 0.4% of 217
2 holders of record
3 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
217-730 AT&T NEW CINGULAR WIRELESS PCS, LLC - IL 2009-09-21 yes yes
217-742 Frontier FRONTIER NORTH, INC. - IL – yes yes
217-939 AT&T NEW CINGULAR WIRELESS PCS, LLC - IL 2020-10-14 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
NEW CINGULAR WIRELESS PCS, LLC - IL AT&T 2 66.7%
FRONTIER NORTH, INC. - IL Frontier 1 33.3%

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 WINCHESTER in area code 217?

3 blocks: 730, 742, 939. The table above gives the holder of each.

Which carriers have numbers in WINCHESTER?

NEW CINGULAR WIRELESS PCS, LLC - IL (2 blocks), FRONTIER NORTH, INC. - IL (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is WINCHESTER 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 217

All 786 prefixes in 217