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

CALLAO prefixes in area code 804

NANPA records 4 assigned NXX blocks to rate center CALLAO in area code 804, 0.5% of the 781 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 ONVOY, LLC - VA (1), VERIZON SOUTH, INC. - VA (CONTEL) (1), LEVEL 3 COMMUNICATIONS, LLC - VA (1). The earliest assignment on record here is 2016-09-02 and the most recent 2022-08-09. 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 code 660 – overlay codes cover the same geography, so a rate center is served by all of them.

4 assigned blocks – 0.5% of 804
4 holders of record
4 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
804-390 Onvoy ONVOY, LLC - VA 2016-09-02 yes yes
804-529 Verizon VERIZON SOUTH, INC. - VA (CONTEL) – yes yes
804-587 Lumen LEVEL 3 COMMUNICATIONS, LLC - VA 2020-05-06 yes yes
804-810 Dish BOOST SUBSCRIBERCO L.L.C. 2022-08-09 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 - VA Onvoy 1 25%
VERIZON SOUTH, INC. - VA (CONTEL) Verizon 1 25%
LEVEL 3 COMMUNICATIONS, LLC - VA Lumen 1 25%
BOOST SUBSCRIBERCO L.L.C. Dish 1 25%

Frequently asked

Which prefixes belong to CALLAO in area code 804?

4 blocks: 390, 529, 587, 810. The table above gives the holder of each.

Which carriers have numbers in CALLAO?

ONVOY, LLC - VA (1 block), VERIZON SOUTH, INC. - VA (CONTEL) (1 block), LEVEL 3 COMMUNICATIONS, LLC - VA (1 block), BOOST SUBSCRIBERCO L.L.C. (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is CALLAO 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 804

All 781 prefixes in 804