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 620
SOUTHWESTERN BELL 149
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - KS 59
UNITED TEL OF EASTERN KANSAS DBA CENTURYLINK 44
LEVEL 3 COMMUNICATIONS, LLC - KS 41
NEW CINGULAR WIRELESS PCS, LLC - IL 32
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
2022-01-13 620-942 6XXX which blocks → TON80 COMMUNICATIONS, LLC 516J ATLANTA KS
2022-01-04 620-572 1XXX which blocks → IDEATEK TELCOM, LLC - KS 014E COPELAND KS
2022-01-04 620-573 1XXX which blocks → IDEATEK TELCOM, LLC - KS 014E ENGLEWOOD KS
2022-01-04 620-574 1XXX which blocks → IDEATEK TELCOM, LLC - KS 014E FORD KS
2022-01-04 620-576 1XXX which blocks → IDEATEK TELCOM, LLC - KS 014E INGALLS KS
2022-01-04 620-578 1XXX which blocks → IDEATEK TELCOM, LLC - KS 014E MONTEZUMA KS
2022-01-04 620-579 1XXX which blocks → IDEATEK TELCOM, LLC - KS 014E SPEARVILLE KS
2021-12-17 620-571 0XXX1XXX2XXX5XXX · 4 holders which blocks → IDEATEK TELCOM, LLC - KS 014E MEADE KS
2021-11-04 620-559 0XXX1XXX2XXX4XXX5XXX6XXX8XXX9XXX · 7 holders which blocks → ONVOY, LLC - KS 205F EUREKA KS
2021-10-04 620-558 0XXX1XXX5XXX8XXX · 4 holders which blocks → CSC WIRELESS, LLC 425J RIVERTON KS
2021-07-27 620-540 0XXX1XXX2XXX4XXX · 4 holders which blocks → TELNYX LLC 073H HOWARD KS
2021-07-27 620-556 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LIBERAL KS
2021-07-06 620-799 0XXX7XXX9XXX · 3 holders which blocks → FRACTEL, LLC 965H BELPRE KS
2021-07-06 620-822 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H PITTSBURG KS
2021-06-23 620-552 0XXX1XXX2XXX3XXX4XXX · 5 holders which blocks → ONVOY, LLC - KS 205F CHASE KS
2021-06-22 620-519 0XXX1XXX · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - KS 986E WALTON KS
2021-06-18 620-512 0XXX1XXX · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - KS 986E OXFORD KS
2021-06-10 620-502 0XXX1XXX8XXX · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - KS 986E HAVEN KS
2021-06-09 620-503 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 6 holders which blocks → ONVOY, LLC - KS 205F MCPHERSON KS
2021-05-20 620-477 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 8 holders which blocks → HD CARRIER LLC 321J HUMBOLDT KS
2021-05-14 620-469 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 ARKANSASCY KS
2021-05-04 620-460 0XXX7XXX8XXX9XXX · 3 holders which blocks → METROPCS, INC. 5562 TYRO KS
2021-03-02 620-420 0XXX1XXX2XXX5XXX8XXX · 5 holders which blocks → UNITED COMMUNICATIONS ASSOCIATION, INC. - KS 925G KINSLEY KS
2021-02-12 620-418 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 FORT SCOTT KS
2021-02-12 620-419 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 PRATT KS
2021-01-12 620-484 0XXX1XXX4XXX5XXX · 3 holders which blocks → ONVOY, LLC - KS 205F BUHLER KS
2021-01-12 620-494 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → ONVOY, LLC - KS 205F BURNS KS
2020-10-09 620-416 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX · 5 holders which blocks → TC WIRELESS, INC - KS 433H HILLSBORO KS
2020-10-02 620-599 0XXX1XXX5XXX6XXX9XXX · 4 holders which blocks → ONVOY, LLC - KS 205F PRESTON KS
2020-10-02 620-610 0XXX1XXX2XXX · 2 holders which blocks → ONVOY, LLC - KS 205F FALL RIVER KS
2020-10-02 620-630 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - KS 205F RIVERTON KS
2020-10-02 620-667 0–9 XXXall 10 · 9 holders which blocks → ONVOY, LLC - KS 205F COTONWDFLS KS
2020-08-28 620-406 0XXX1XXX2XXX3XXX · 3 holders which blocks → NUSO, LLC 478J TREECE KS
2020-08-04 620-733 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 7 holders which blocks → FRACTEL, LLC 965H PROTECTION KS
2020-08-04 620-944 0XXX1XXX3XXX4XXX5XXX7XXX8XXX9XXX · 7 holders which blocks → FRACTEL, LLC 965H FOWLER KS
2020-06-30 620-677 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 8 holders which blocks → FRACTEL, LLC 965H PLAINS KS
2020-06-30 620-788 0XXX1XXX2XXX3XXX4XXX7XXX8XXX · 6 holders which blocks → FRACTEL, LLC 965H MOLINE KS
2020-06-30 620-833 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 8 holders which blocks → FRACTEL, LLC 965H HUTCHINSON KS
2020-06-30 620-844 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → FRACTEL, LLC 965H HAMILTON KS
2020-06-30 620-977 0XXX1XXX2XXX4XXX5XXX6XXX7XXX9XXX · 7 holders which blocks → FRACTEL, LLC 965H MINNEOLA KS
2020-03-12 620-250 0XXX1XXX3XXX7XXX8XXX9XXX · 5 holders which blocks → AT&T - LOCAL 7421 CANTON KS
2019-08-08 620-310 0XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → ONVOY, LLC - KS 205F ABBYVLPLVN KS
2019-08-08 620-413 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - KS 205F HUDSON KS
2019-08-08 620-470 0XXX1XXX2XXX4XXX6XXX7XXX · 2 holders which blocks → ONVOY, LLC - KS 205F LANGDON KS
2019-08-08 620-520 0XXX2XXX3XXX4XXX5XXX6XXX · 2 holders which blocks → ONVOY, LLC - KS 205F KINCAID KS
2019-08-08 620-570 0XXX3XXX4XXX5XXX6XXX7XXX · 2 holders which blocks → ONVOY, LLC - KS 205F MORAN KS
2019-05-22 620-882 0XXX1XXX2XXX3XXX4XXX5XXX6XXX9XXX · 7 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - KS 8995 COLDWATER KS
2019-03-26 620-303 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - KS 986E HARTFORD KS
2019-03-20 620-529 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H ST PAUL KS
2019-03-20 620-946 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 7 holders which blocks → FRACTEL, LLC 965H CHETOPA KS

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.