NumberResearch Membership · Data 09/19/2026

Recent prefix assignments

7 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026

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, last 30 days — NPA 479
NEW CINGULAR WIRELESS PCS, LLC - IL 3
ONVOY, LLC - AR 2
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 2
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
2021-08-20 479-450 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - AR 802C SPRINGDALE AR
2021-07-27 479-457 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - AR 348F BOLES AR
2021-06-23 479-446 0XXX1XXX2XXX4XXX6XXX7XXX · 4 holders which blocks → ONVOY, LLC - AR 348F MOUNTAINBG AR
2021-06-23 479-454 2XXX4XXX5XXX · 3 holders which blocks → ONVOY, LLC - AR 348F CENTERVL AR
2021-06-09 479-440 0XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 CLARKSVL AR
2021-04-19 479-416 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - AR 802C BENTONVL AR
2021-04-19 479-421 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - AR 802C BENTONVL AR
2021-04-19 479-423 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - AR 802C BENTONVL AR
2021-04-19 479-428 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - AR 802C BENTONVL AR
2021-04-19 479-436 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - AR 802C BENTONVL AR
2021-04-17 479-671 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - AR 802C BENTONVL AR
2021-04-16 479-910 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - AR 348F FORT SMITH AR
2021-04-13 479-901 0–9 XXXall 10 · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H FORT SMITH AR
2021-03-05 479-413 0–9 XXXall 10 · 3 holders which blocks → TELNYX LLC 073H ROGERS AR
2021-02-03 479-448 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - AR 348F BENTONVL AR
2021-02-01 479-977 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - AR 348F FORT SMITH AR
2021-01-15 479-412 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CENTERTON AR
2021-01-11 479-425 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - AR 348F ALMA AR
2020-12-18 479-429 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - AR 348F HARTMAN AR
2020-12-18 479-470 0XXX1XXX2XXX4XXX5XXX7XXX9XXX · 3 holders which blocks → ONVOY, LLC - AR 348F HECTOR AR
2020-12-18 479-472 2XXX3XXX4XXX7XXX8XXX · 2 holders which blocks → ONVOY, LLC - AR 348F RATCLIFF AR
2020-12-18 479-473 2XXX3XXX4XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - AR 348F SCRANTON AR
2020-12-18 479-475 4XXX5XXX7XXX · 2 holders which blocks → ONVOY, LLC - AR 348F SUBIACO AR
2020-12-18 479-679 4XXX7XXX8XXX · 2 holders which blocks → ONVOY, LLC - AR 348F SALUS AR
2020-12-18 479-779 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - AR 348F OZARK AR
2020-12-09 479-449 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - AR 348F RUSSELLVL AR
2020-12-07 479-408 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SPRINGDALE AR
2020-11-23 479-432 0XXX1XXX2XXX3XXX4XXX5XXX6XXX9XXX · 3 holders which blocks → ONVOY, LLC - AR 348F MIDLAND AR
2020-11-11 479-405 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 ROGERS AR
2020-10-12 479-399 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ROGERS AR
2020-10-12 479-403 0–9 XXXall 10 · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - AR 802C BENTONVL AR
2020-10-02 479-433 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - AR 348F WALDRON AR
2020-10-02 479-447 0XXX4XXX5XXX7XXX · 3 holders which blocks → ONVOY, LLC - AR 348F MANSFIELD AR
2020-10-02 479-467 0XXX1XXX6XXX7XXX · 3 holders which blocks → ONVOY, LLC - AR 348F CHARLESTON AR
2020-10-01 479-398 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - AR 348F HACKETT AR
2020-09-21 479-397 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FORT SMITH AR
2020-08-14 479-396 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FAYETTEVL AR
2020-07-29 479-392 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FORT SMITH AR
2020-07-16 479-391 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 ROGERS AR
2020-07-15 479-390 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - AR 802C ALTUS AR
2020-07-10 479-389 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ROGERS AR
2020-06-26 479-480 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - AR 348F FAYETTEVL AR
2020-06-26 479-579 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - AR 348F BENTONVL AR
2020-06-04 479-388 0–9 XXXall 10 · 3 holders which blocks → CSC WIRELESS, LLC 425J FORT SMITH AR
2020-05-19 479-386 0XXX1XXX6XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 DECATUR AR
2020-04-08 479-384 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FORT SMITH AR
2020-03-24 479-383 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 VAN BUREN AR
2020-03-09 479-380 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FAYETTEVL AR
2020-03-06 479-379 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 SPRINGDALE AR
2020-02-11 479-354 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ROGERS AR

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.