NumberResearch Membership · Data 09/23/2026

Recent prefix assignments

338 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/23/2026

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
8X8, INC. 39
ONVOY, LLC - CA 27
NEW CINGULAR WIRELESS PCS, LLC - IL 27
NEW CINGULAR WIRELESS PCS, LLC - DC 26
ONVOY, LLC - NJ 15
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
— 870-777 not yet reported which blocks → SOUTHWESTERN BELL 9533 HOPE AR
— 870-778 8XXX which blocks → TCA COMMUNICATIONS, LLC DBA SUDDENLINK COMM - AR 048G GASSVILLE AR
— 870-779 not yet reported which blocks → VALOR TELECOMM TX, LP-TX #1 DBA WINDSTREAM COMM SW 1163 TEXARKANA AR
— 870-780 not yet reported which blocks → SOUTHWESTERN BELL 9533 BLYTHEVL AR
— 870-781 2XXX7XXX · 2 holders which blocks → BRIGHTSPEED OF NORTHWEST ARKANSAS, LLC 1143 BAY AR
— 870-786 2XXX3XXX7XXX8XXX · 3 holders which blocks → SOUTHWESTERN BELL 9533 STEPHENS AR
— 870-791 none assigned yet which blocks → T-MOBILE USA, INC. 6529 CAMDEN AR
— 870-792 0XXX2XXX3XXX4XXX5XXX9XXX · 6 holders which blocks → SOUTHWESTERN BELL 9533 EARLE AR
— 870-793 not yet reported which blocks → SOUTHWESTERN BELL 9533 BATESVILLE AR
— 870-794 1XXX2XXX5XXX6XXX7XXX8XXX which blocks → SOUTHWESTERN BELL 9533 PINE BLUFF AR
— 870-797 none assigned yet which blocks → SOUTHWESTERN BELL 9533 STRONG AR
— 870-798 not yet reported which blocks → SOUTH ARKANSAS TEL. CO., INC. 1702 HAMPTON AR
— 870-799 0XXX4XXX5XXX7XXX · 3 holders which blocks → SOUTHWESTERN BELL 9533 NEWARK AR
— 870-802 9XXX which blocks → SOUTHWESTERN BELL 9533 JONESBORO AR
— 870-805 2XXX3XXX4XXX5XXX6XXX7XXX · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 BATESVILLE AR
— 870-806 0–9 XXXall 10 · 7 holders which blocks → T-MOBILE USA, INC. 6529 BATESVILLE AR
— 870-807 none assigned yet which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 CAMDEN AR
— 870-809 3XXX5XXX8XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 WALNUT RDG AR
— 870-810 4XXX5XXX7XXX8XXX9XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 POCAHONTAS AR
— 870-811 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX AR
— 870-814 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 EL DORADO AR
— 870-815 2XXX6XXX8XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 OSCEOLA AR
— 870-816 4XXX9XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 HELENA AR
— 870-817 not yet reported which blocks → SOUTHWESTERN BELL 9533 HELENA AR
— 870-818 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CAMDEN AR
— 870-819 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → SOUTHWESTERN BELL 9533 JONESBORO AR
— 870-823 0XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → SOUTHWESTERN BELL 9533 CRAWFODSVL AR
— 870-824 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → T-MOBILE USA, INC. 6529 BLYTHEVL AR
— 870-826 2XXX3XXX4XXX5XXX7XXX8XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HOPE AR
— 870-827 not yet reported which blocks → WINDSTREAM ARKANSAS, INC. 1691 ELAINE AR
— 870-829 4XXX which blocks → BRIGHTSPEED OF CENTRAL ARKANSAS, LLC 1144 MARVELL AR
— 870-830 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 STUTTGART AR
— 870-832 7XXX8XXX · 2 holders which blocks → WINDSTREAM ARKANSAS, INC. 1691 HORATIO AR
— 870-835 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PINE BLUFF AR
— 870-836 not yet reported which blocks → SOUTHWESTERN BELL 9533 CAMDEN AR
— 870-837 4XXX which blocks → SOUTHWESTERN BELL 9533 CAMDEN AR
— 870-838 0XXX8XXX9XXX · 3 holders which blocks → SOUTHWESTERN BELL 9533 BLYTHEVL AR
— 870-845 0XXX which blocks → SOUTHWESTERN BELL 9533 NASHVILLE AR
— 870-850 none assigned yet which blocks → SOUTHWESTERN BELL 9533 PINE BLUFF AR
— 870-852 not yet reported which blocks → E. RITTER TEL. CO. 1722 OAK ACRES AR
— 870-853 3XXX which blocks → SOUTHWESTERN BELL 9533 HAMBURG AR
— 870-854 0XXX7XXX8XXX · 2 holders which blocks → BRIGHTSPEED OF CENTRAL ARKANSAS, LLC 1144 HICKORY PL AR
— 870-856 not yet reported which blocks → BRIGHTSPEED OF ARKANSAS, LLC 1706 HARDY AR
— 870-857 2XXX4XXX7XXX9XXX · 4 holders which blocks → BRIGHTSPEED OF CENTRAL ARKANSAS, LLC 1144 CORNING AR
— 870-859 7XXX which blocks → BRIGHTSPEED OF LOUISIANA, LLC 0434 NOSPRINGHL AR
— 870-861 not yet reported which blocks → TRI-COUNTY TEL. CO., INC. 1726 PONCA AR
— 870-862 not yet reported which blocks → SOUTHWESTERN BELL 9533 EL DORADO AR
— 870-863 not yet reported which blocks → SOUTHWESTERN BELL 9533 EL DORADO AR
— 870-864 not yet reported which blocks → SOUTHWESTERN BELL 9533 EL DORADO AR
— 870-866 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 EL DORADO AR

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/23/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.