NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

The Code holder is who opened each NPA-NXX prefix — not necessarily who holds the numbers. A prefix is 10,000 numbers, but under pooling its ten 1,000-number blocks are handed out individually, often to different carriers; the code holder may hold only one block, or none. The Thousands-blocks column shows how the ten blocks are really split — click which blocks → to see who holds each 1,000-number block and its last-4-digit range. Assignments are initial assignments; the current serving carrier may differ due to portability.

Most active assignees, all time — NPA 417
SOUTHWESTERN BELL 100
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 88
BRIGHTSPEED OF MISSOURI, LLC 82
NEW CINGULAR WIRELESS PCS, LLC - IL 51
ONVOY, LLC - MO 40
New assignments by month Sep 2026 Aug 2026 Jul 2026 Jun 2026 May 2026 Apr 2026 Mar 2026 Feb 2026 Jan 2026 Dec 2025 Nov 2025 Oct 2025
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Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2021-03-03 417-774 0XXX2XXX4XXX · 3 holders which blocks → ONVOY, LLC - MO 093F JASPER MO
2021-02-04 417-530 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - MO 093F SPRINGFLD MO
2021-02-01 417-810 0XXX1XXX7XXX8XXX · 4 holders which blocks → ONVOY, LLC - MO 093F BRANSON W MO
2020-12-02 417-605 0–9 XXXall 10 · 5 holders which blocks → IP HORIZON LLC 515J SPRINGFLD MO
2020-10-26 417-508 5XXX7XXX8XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 POWELL MO
2020-10-26 417-602 9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 STELLA MO
2020-10-22 417-610 0XXX6XXX7XXX · 2 holders which blocks → ONVOY, LLC - MO 093F COLLINS MO
2020-10-19 417-607 0XXX2XXX6XXX7XXX · 2 holders which blocks → ONVOY, LLC - MO 093F MANO MO
2020-10-19 417-617 0XXX1XXX2XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → ONVOY, LLC - MO 093F KIMBELNGCY MO
2020-10-14 417-510 0XXX1XXX2XXX3XXX4XXX5XXX · 3 holders which blocks → ONVOY, LLC - MO 093F LOCKWOOD MO
2020-10-08 417-517 4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → ONVOY, LLC - MO 093F REEDS SPG MO
2020-09-30 417-590 0–9 XXXall 10 · 5 holders which blocks → AIRESPRING, INC. 996H SPRINGFLD MO
2020-09-03 417-822 0XXX1XXX2XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H AURORA MO
2020-06-11 417-513 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 NEOSHO MO
2020-04-30 417-688 1XXX6XXX8XXX · 3 holders which blocks → FRACTEL, LLC 965H LOWRY CITY MO
2020-03-27 417-701 0XXX1XXX2XXX3XXX4XXX8XXX9XXX · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - MO 993E HARTVILLE MO
2020-03-16 417-512 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 SPRINGFLD MO
2020-03-13 417-480 0XXX3XXX4XXX7XXX9XXX · 4 holders which blocks → AT&T - LOCAL 7421 ASH GROVE MO
2019-12-19 417-433 3XXX4XXX9XXX · 3 holders which blocks → FRACTEL, LLC 965H WALKER MO
2019-12-05 417-477 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → FRACTEL, LLC 965H MOUNTANGRV MO
2019-12-05 417-488 4XXX7XXX8XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H BOLIVAR MO
2019-12-05 417-500 0XXX1XXX5XXX7XXX8XXX · 3 holders which blocks → FRACTEL, LLC 965H CABOOL MO
2019-12-05 417-600 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 8 holders which blocks → FRACTEL, LLC 965H WILLARD MO
2019-12-05 417-786 2XXX7XXX · 2 holders which blocks → FRACTEL, LLC 965H NIANGUA MO
2019-12-05 417-899 0XXX2XXX4XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H BUFFALO MO
2019-12-05 417-946 0XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → FRACTEL, LLC 965H MANSFIELD MO
2019-11-25 417-507 0–9 XXXall 10 · 6 holders which blocks → TELNYX LLC 073H SPRINGFLD MO
2019-11-21 417-518 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 BOLIVAR MO
2019-10-25 417-377 2XXX7XXX9XXX · 3 holders which blocks → FRACTEL, LLC 965H MANES MO
2019-08-22 417-900 0XXX1XXX2XXX3XXX4XXX5XXX6XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H MARIONVL MO
2019-08-16 417-444 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H SPRINGFLD MO
2019-08-08 417-516 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 BOLIVAR MO
2019-08-07 417-490 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - MO 093F SARCOXIE MO
2019-05-08 417-502 0–9 XXXwhole prefix which blocks → ONVOY, LLC - MO 093F JOPLIN MO
2019-04-11 417-427 0–9 XXXwhole prefix which blocks → ONVOY, LLC - MO 093F SPRINGFLD MO
2019-04-10 417-419 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 SPRINGFLD MO
2019-03-28 417-412 0–9 XXXall 10 · 2 holders which blocks → CSC WIRELESS, LLC 425J BRANSON MO
2019-03-26 417-702 7XXX9XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 BOLIVAR MO
2019-02-15 417-418 0–9 XXXwhole prefix which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO 7594 SPRINGFLD MO
2019-01-25 417-999 none assigned yet which blocks → TERRA NOVA TELECOM INC. 145J E ARCADIA MO
2019-01-18 417-407 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 BOLIVAR MO
2019-01-16 417-410 0–9 XXXall 10 · 2 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 BOLIVAR MO
2018-12-17 417-814 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 SPRINGFLD MO
2018-10-23 417-390 0–9 XXXall 10 · 7 holders which blocks → SOUTHWESTERN BELL 9533 MONETT MO
2018-10-17 417-401 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 BOLIVAR MO
2018-09-18 417-360 0–9 XXXall 10 · 2 holders which blocks → MCC TELEPHONY LLC 593K SPRINGFLD MO
2018-09-04 417-408 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 SPRINGFLD MO
2018-07-12 417-406 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 BOLIVAR MO
2018-04-04 417-908 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 SPRINGFLD MO
2018-03-26 417-907 0XXX9XXX · 2 holders which blocks → VONAGE AMERICA LLC 197D GALENA MO

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.