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

SIMIVALLEY prefixes in area code 820

NANPA records 3 assigned NXX blocks to rate center SIMIVALLEY in area code 820, 3.1% 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. 3 holders hold those blocks, the largest being FRACTEL, LLC (1), ONVOY SPECTRUM, LLC (1), TERRA NOVA TELECOM INC. (1). The earliest assignment on record here is 2018-12-24 and the most recent 2023-12-05. 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 code 805 – overlay codes cover the same geography, so a rate center is served by all of them.

3 assigned blocks – 3.1% of 820
3 holders of record
3 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
820-386 FRACTEL, LLC 2022-05-31 yes yes
820-502 Charter ONVOY SPECTRUM, LLC 2023-12-05 yes yes
820-888 TERRA NOVA TELECOM INC. 2018-12-24 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
FRACTEL, LLC – 1 33.3%
ONVOY SPECTRUM, LLC Charter 1 33.3%
TERRA NOVA TELECOM INC. – 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 SIMIVALLEY in area code 820?

3 blocks: 386, 502, 888. The table above gives the holder of each.

Which carriers have numbers in SIMIVALLEY?

FRACTEL, LLC (1 block), ONVOY SPECTRUM, LLC (1 block), TERRA NOVA TELECOM INC. (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is SIMIVALLEY 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 820

All 98 prefixes in 820