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
2004-06-02 870-490 4XXX8XXX9XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 MOUNT IDA AR
2004-06-01 870-504 8XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MARSHALL AR
2004-05-27 870-635 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 W MEMPHIS AR
2004-05-24 870-279 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DE QUEEN AR
2004-04-14 870-229 1XXX7XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - AR 5179 CROSSETT AR
2004-04-14 870-417 0XXX1XXX2XXX3XXX6XXX7XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - AR 5179 LAKE VLG AR
2004-03-17 870-796 3XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 PRESCOTT AR
2004-03-10 870-785 0XXX1XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → E. RITTER COMMUNICATIONS, LLC 128L OIL TROUGH AR
2004-01-13 870-559 0–9 XXXall 10 · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 MARION AR
2004-01-08 870-250 6XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FORDYCE AR
2003-12-29 870-376 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - AR 5179 BATESVILLE AR
2003-12-18 870-461 8XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 RISON AR
2003-12-04 870-227 3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 TRUMANN AR
2003-11-18 870-727 0XXX1XXX2XXX3XXX6XXX8XXX · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AR 7277 PINE BLUFF AR
2003-10-21 870-500 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CROSSETT AR
2003-10-21 870-501 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MCGEHEE AR
2003-10-20 870-690 2XXX3XXX4XXX5XXX6XXX · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 MCGEHEE AR
2003-10-07 870-883 1XXX4XXX6XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 SHERIDAN AR
2003-10-06 870-882 none assigned yet which blocks → T-MOBILE USA, INC. 6529 JONESBORO AR
2003-10-06 870-884 8XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 FORDYCE AR
2003-10-06 870-885 5XXX7XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 BEARDEN AR
2003-09-22 870-677 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 EL DORADO AR
2003-09-19 870-557 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 NASHVILLE AR
2003-09-15 870-415 3XXX6XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 CROSSETT AR
2003-08-25 870-955 1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 HARDY AR
2003-08-12 870-680 0XXX2XXX3XXX7XXX9XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 JONESBORO AR
2003-08-05 870-650 3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 TRUMANN AR
2003-08-05 870-750 2XXX3XXX5XXX7XXX9XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 HORSEHBEND AR
2003-08-05 870-751 1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 ASH FLAT AR
2003-08-04 870-940 4XXX6XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 HAMBURG AR
2003-08-04 870-944 1XXX5XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 SMACKOVER AR
2003-08-04 870-947 4XXX7XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 STEPHENS AR
2003-08-04 870-951 7XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 STRONG AR
2003-08-04 870-952 1XXX2XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 WARREN AR
2003-08-04 870-953 2XXX3XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 STAMPS AR
2003-07-14 870-549 3XXX4XXX5XXX6XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 OSCEOLA AR
2003-06-26 870-997 2XXX4XXX5XXX8XXX9XXX · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 EUDORA AR
2003-05-14 870-514 2XXX3XXX4XXX5XXX6XXX7XXX8XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 W MEMPHIS AR
2003-05-06 870-414 2XXX which blocks → WINDSTREAM ARKANSAS, INC. 1691 HARRISON AR
2003-04-28 870-450 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 PARAGOULD AR
2003-04-23 870-384 2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 CAVE CITY AR
2003-04-23 870-406 2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 GURDON AR
2003-04-23 870-408 1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 HARRISBURG AR
2003-04-23 870-410 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 WILSON AR
2003-04-21 870-456 4XXX5XXX6XXX7XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 STUTTGART AR
2003-04-17 870-466 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WARREN AR
2003-04-10 870-831 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HAMBURG AR
2003-04-10 870-834 8XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BATESVILLE AR
2003-03-31 870-397 6XXX7XXX8XXX9XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 HOPE AR
2003-02-04 870-440 9XXX which blocks → T-MOBILE USA, INC. 6529 EL DORADO 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.