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

FERRUM prefixes in area code 540

NANPA records 3 assigned NXX blocks to rate center FERRUM in area code 540, 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 BRIGHTSPEED OF VIRGINIA, LLC (2), LEVEL 3 COMMUNICATIONS, LLC - VA (1). The earliest assignment on record here is 2002-10-03 and the most recent 2002-10-03. 3 of them are in thousands-block pooling, so those prefixes are shared between carriers in 1,000-number lots.

3 assigned blocks – 0.4% of 540
2 holders of record
3 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
540-346 Lumen LEVEL 3 COMMUNICATIONS, LLC - VA 2002-10-03 yes yes
540-365 Brightspeed BRIGHTSPEED OF VIRGINIA, LLC – yes yes
540-367 Brightspeed BRIGHTSPEED OF VIRGINIA, LLC – 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
BRIGHTSPEED OF VIRGINIA, LLC Brightspeed 2 66.7%
LEVEL 3 COMMUNICATIONS, LLC - VA Lumen 1 33.3%

Frequently asked

Which prefixes belong to FERRUM in area code 540?

3 blocks: 346, 365, 367. The table above gives the holder of each.

Which carriers have numbers in FERRUM?

BRIGHTSPEED OF VIRGINIA, LLC (2 blocks), LEVEL 3 COMMUNICATIONS, LLC - VA (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is FERRUM 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 540

All 786 prefixes in 540