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

MILTON prefixes in area code 209

NANPA records 4 assigned NXX blocks to rate center MILTON in area code 209, 0.5% of the 784 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 IP HORIZON LLC (1), ONVOY, LLC - CA (1), PACIFIC BELL (1). 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 codes 217, 272, 302, 304 – overlay codes cover the same geography, so a rate center is served by all of them.

4 assigned blocks – 0.5% of 209
4 holders of record
4 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
209-788 IP HORIZON LLC – yes yes
209-885 Onvoy ONVOY, LLC - CA – yes yes
209-899 AT&T PACIFIC BELL – yes yes
209-980 Bandwidth BANDWIDTH.COM CLEC, LLC - CA – 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
IP HORIZON LLC – 1 25%
ONVOY, LLC - CA Onvoy 1 25%
PACIFIC BELL AT&T 1 25%
BANDWIDTH.COM CLEC, LLC - CA Bandwidth 1 25%

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 MILTON in area code 209?

4 blocks: 788, 885, 899, 980. The table above gives the holder of each.

Which carriers have numbers in MILTON?

IP HORIZON LLC (1 block), ONVOY, LLC - CA (1 block), PACIFIC BELL (1 block), BANDWIDTH.COM CLEC, LLC - CA (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is MILTON 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 209

All 784 prefixes in 209