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

CASSVILLE prefixes in area code 417

NANPA records 6 assigned NXX blocks to rate center CASSVILLE in area code 417, 0.8% of the 711 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 LEVEL 3 COMMUNICATIONS, LLC - MO (2), BRIGHTSPEED OF MISSOURI, LLC (2), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO (1). The earliest assignment on record here is 2001-05-14 and the most recent 2004-02-24. 6 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 608 – overlay codes cover the same geography, so a rate center is served by all of them.

6 assigned blocks – 0.8% of 417
4 holders of record
6 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
417-342 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 2004-02-24 yes yes
417-665 Lumen CENTURYLINK COMMUNICATIONS, LLC – yes yes
417-671 Lumen LEVEL 3 COMMUNICATIONS, LLC - MO 2001-05-14 yes yes
417-846 Brightspeed BRIGHTSPEED OF MISSOURI, LLC – yes yes
417-847 Brightspeed BRIGHTSPEED OF MISSOURI, LLC – yes yes
417-896 Lumen LEVEL 3 COMMUNICATIONS, LLC - MO 2004-01-21 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
LEVEL 3 COMMUNICATIONS, LLC - MO Lumen 2 33.3%
BRIGHTSPEED OF MISSOURI, LLC Brightspeed 2 33.3%
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO Verizon 1 16.7%
CENTURYLINK COMMUNICATIONS, LLC Lumen 1 16.7%

Frequently asked

Which prefixes belong to CASSVILLE in area code 417?

6 blocks: 342, 665, 671, 846, 847, 896. The table above gives the holder of each.

Which carriers have numbers in CASSVILLE?

LEVEL 3 COMMUNICATIONS, LLC - MO (2 blocks), BRIGHTSPEED OF MISSOURI, LLC (2 blocks), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO (1 block), CENTURYLINK COMMUNICATIONS, LLC (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is CASSVILLE 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 417

All 711 prefixes in 417