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 870
SOUTHWESTERN BELL 154
NEW CINGULAR WIRELESS PCS, LLC - IL 105
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 85
WINDSTREAM ARKANSAS, INC. 72
LEVEL 3 COMMUNICATIONS, LLC - AR 47
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
2025-12-15 870-960 1XXX which blocks → E. RITTER COMMUNICATIONS, LLC 128L PINE BLUFF AR
2024-08-08 870-954 0XXX which blocks → ONVOY SPECTRUM, LLC 624H ASH FLAT AR
2024-08-08 870-986 0XXX which blocks → ONVOY SPECTRUM, LLC 624H NORPHLET AR
2024-08-08 870-988 0XXX8XXX · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H HARDY AR
2024-07-26 870-870 0XXX1XXX2XXX4XXX7XXX8XXX9XXX · 2 holders which blocks → IP HORIZON LLC 515J PINE BLUFF AR
2024-06-03 870-981 0XXX1XXX2XXX8XXX9XXX · 4 holders which blocks → ONVOY SPECTRUM, LLC 624H BIGGERS AR
2024-06-03 870-984 0XXX1XXX8XXX · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H BLOOMNGGRV AR
2024-05-31 870-979 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BLYTHEVL AR
2024-05-16 870-975 0XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 FOREMAN AR
2024-04-22 870-327 0–9 XXXall 10 · 7 holders which blocks → ONVOY SPECTRUM, LLC 624H JONESBORO AR
2024-03-25 870-969 2XXX9XXX · 2 holders which blocks → CSC VOICE, LLC 612K ROE AR
2024-02-28 870-963 0XXX1XXX8XXX · 3 holders which blocks → IP HORIZON LLC 515J HELENA AR
2024-02-28 870-964 0XXX1XXX · 2 holders which blocks → IP HORIZON LLC 515J JOINER AR
2024-02-28 870-968 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 6 holders which blocks → IP HORIZON LLC 515J WYNNE AR
2024-02-21 870-720 0XXX9XXX · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H VIOLA AR
2024-02-20 870-961 0XXX which blocks → ONVOY SPECTRUM, LLC 624H ROSSTON AR
2024-02-20 870-996 0XXX6XXX · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H BLEVINS AR
2024-02-16 870-989 0XXX1XXX2XXX3XXX8XXX · 3 holders which blocks → IP HORIZON LLC 515J BLACK ROCK AR
2023-08-23 870-928 0XXX1XXX2XXX · 3 holders which blocks → CSC VOICE, LLC 612K CAVE CITY AR
2023-07-13 870-915 0XXX which blocks → BOOST SUBSCRIBERCO L.L.C. 490J PAYNEWAY AR
2023-07-13 870-927 0XXX which blocks → BOOST SUBSCRIBERCO L.L.C. 490J WEINER AR
2023-06-15 870-923 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 BLYTHEVL AR
2023-06-09 870-787 0–9 XXXall 10 · 6 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J PARAGOULD AR
2023-05-26 870-745 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FORREST CY AR
2023-04-14 870-472 0XXX1XXX2XXX3XXX7XXX8XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - AR 5179 NASHVILLE AR
2023-03-24 870-452 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX · 5 holders which blocks → COMCAST IP PHONE, LLC 318J EL DORADO AR
2023-03-17 870-288 0–9 XXXall 10 · 5 holders which blocks → NUSO, LLC 732J EL DORADO AR
2023-01-11 870-980 0XXX1XXX2XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - AR 348F GRUBBS AR
2023-01-06 870-967 0XXX1XXX2XXX8XXX · 3 holders which blocks → ONVOY, LLC - AR 348F CONCORD AR
2022-12-30 870-272 0XXX1XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - AR 802C TURRELL AR
2022-11-03 870-908 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → COMMIO, LLC 939H ARKADLPHIA AR
2022-10-17 870-965 0XXX1XXX8XXX · 3 holders which blocks → CSC VOICE, LLC 612K CASH AR
2022-08-04 870-903 7XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - AR 5179 FULTON AR
2022-05-26 870-851 0XXX7XXX · 2 holders which blocks → E. RITTER COMMUNICATIONS, LLC 128L CRAWFODSVL AR
2022-05-26 870-889 0XXX1XXX2XXX3XXX7XXX8XXX · 6 holders which blocks → E. RITTER COMMUNICATIONS, LLC 128L HUGHES AR
2022-05-26 870-891 0XXX1XXX2XXX7XXX · 4 holders which blocks → E. RITTER COMMUNICATIONS, LLC 128L NEWARK AR
2022-03-01 870-922 0XXX1XXX2XXX3XXX4XXX9XXX · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J AUGUSTA AR
2022-03-01 870-977 0XXX1XXX2XXX7XXX · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J BLACKFIHLK AR
2022-02-24 870-855 0XXX5XXX8XXX · 2 holders which blocks → ONVOY, LLC - AR 348F MELBOURNE AR
2022-02-24 870-865 1XXX2XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - AR 348F EL DORADO AR
2022-02-24 870-902 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - AR 348F BLYTHEVL AR
2022-02-03 870-849 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 HARRISON AR
2022-01-13 870-840 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 TEXARKANA AR
2022-01-13 870-846 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - AR 196F ASHDOWN AR
2022-01-13 870-848 0XXX3XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HOPE AR
2021-12-06 870-560 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PARAGOULD AR
2021-08-10 870-839 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MARION AR
2021-06-02 870-813 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → STRATUS NETWORKS 495J BODCAW AR
2021-03-10 870-795 0XXX1XXX5XXX7XXX9XXX · 4 holders which blocks → COMCAST IP PHONE, LLC 318J PARKIN AR
2021-03-04 870-244 0–9 XXXall 10 · 6 holders which blocks → COMCAST IP PHONE, LLC 318J EARLE AR

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.