NumberResearch Membership · Data 09/30/2026

Recent prefix assignments

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

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
Rogers Communications Canada Inc. (Wireless) 46
8X8, INC. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 27
NEW CINGULAR WIRELESS PCS, LLC - IL 23
ONVOY, LLC - CA 19
New assignments by month Oct 2026 Sep 2026 Aug 2026 Jul 2026 Jun 2026 May 2026 Apr 2026 Mar 2026 Feb 2026 Jan 2026 Dec 2025 Nov 2025
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Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
— 501-676 8XXX which blocks → SOUTHWESTERN BELL 9533 LONOKE AR
— 501-679 not yet reported which blocks → WINDSTREAM ARKANSAS, INC. 1691 GREENBRIER AR
— 501-680 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 LITTLEROCK AR
— 501-681 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LITTLEROCK AR
— 501-682 not yet reported which blocks → WINDSTREAM COMMUNICATIONS, INC. - AR 7656 LITTLEROCK AR
— 501-683 8XXX9XXX which blocks → SOUTHWESTERN BELL 9533 LITTLEROCK AR
— 501-686 not yet reported which blocks → SOUTHWESTERN BELL 9533 LITTLEROCK AR
— 501-687 3XXX4XXX7XXX which blocks → WINDSTREAM COMMUNICATIONS, INC. - AR 7656 LITTLEROCK AR
— 501-688 not yet reported which blocks → SOUTHWESTERN BELL 9533 LITTLEROCK AR
— 501-690 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 LITTLEROCK AR
— 501-691 3XXX4XXX5XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HEBER SPG AR
— 501-693 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 HOTSPRINGS AR
— 501-694 not yet reported which blocks → LEVEL 3 COMMUNICATIONS, LLC - AR 5179 LITTLEROCK AR
— 501-697 4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CONWAY AR
— 501-700 not yet reported which blocks → AR
— 501-701 0XXX2XXX3XXX4XXX7XXX8XXX9XXX · 4 holders which blocks → SOUTHWESTERN BELL 9533 HOTSPRINGS AR
— 501-707 3XXX4XXX5XXX7XXX8XXX · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AR 7277 LITTLEROCK AR
— 501-708 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AR 7277 LITTLEROCK AR
— 501-711 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX AR
— 501-716 7XXX8XXX which blocks → SOUTHWESTERN BELL 9533 LITTLEROCK AR
— 501-721 not yet reported which blocks → SOUTHWESTERN BELL 9533 XXXXXXXXXX AR
— 501-722 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → WINDSTREAM COMMUNICATIONS, INC. - AR 7656 BENTON AR
— 501-723 not yet reported which blocks → ARKANSAS TEL. CO., INC. 1692 SHIRLEY AR
— 501-724 none assigned yet which blocks → BRIGHTSPEED OF NORTHWEST ARKANSAS, LLC 1142 BALD KNOB AR
— 501-725 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - AR 5179 LITTLEROCK AR
— 501-726 not yet reported which blocks → BRIGHTSPEED OF CENTRAL ARKANSAS, LLC 1144 MCRAE AR
— 501-727 2XXX3XXX4XXX8XXX9XXX · 4 holders which blocks → SOUTHWESTERN BELL 9533 MORRILTON AR
— 501-728 1XXX which blocks → WINDSTREAM ARKANSAS, INC. 1691 PANGBURN AR
— 501-729 8XXX which blocks → BRIGHTSPEED OF CENTRAL ARKANSAS, LLC 1144 JUDSONIA AR
— 501-730 not yet reported which blocks → SOUTHWESTERN BELL 9533 CONWAY AR
— 501-732 2XXX3XXX4XXX5XXX7XXX8XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MALVERN AR
— 501-733 6XXX8XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CONWAY AR
— 501-734 8XXX9XXX · 2 holders which blocks → WINDSTREAM COMMUNICATIONS, INC. - AR 7656 PALARM AR
— 501-737 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → COMCAST IP PHONE, LLC 318J SCOTT AR
— 501-742 not yet reported which blocks → BRIGHTSPEED OF CENTRAL ARKANSAS, LLC 1144 KENSETT AR
— 501-743 0XXX2XXX5XXX · 2 holders which blocks → BRIGHTSPEED OF CENTRAL ARKANSAS, LLC 1144 CABOT AR
— 501-745 not yet reported which blocks → ARKANSAS TEL. CO., INC. 1692 CLINTON AR
— 501-748 5XXX6XXX7XXX8XXX9XXX which blocks → WINDSTREAM COMMUNICATIONS, INC. - AR 7656 LITTLEROCK AR
— 501-749 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LITTLEROCK AR
— 501-753 not yet reported which blocks → SOUTHWESTERN BELL 9533 LITTLEROCK AR
— 501-758 not yet reported which blocks → SOUTHWESTERN BELL 9533 LITTLEROCK AR
— 501-759 5XXX6XXX7XXX8XXX · 3 holders which blocks → WINDSTREAM ARKANSAS, INC. 1691 BIGELOW AR
— 501-760 0XXX5XXX8XXX9XXX · 3 holders which blocks → SOUTHWESTERN BELL 9533 HOTSPRINGS AR
— 501-762 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - AR 5179 HOTSPRINGS AR
— 501-763 not yet reported which blocks → AMERICAN MESSAGING SERVICES, LLC 9748 HOTSPRINGS AR
— 501-764 0XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → SOUTHWESTERN BELL 9533 CONWAY AR
— 501-765 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LITTLEROCK AR
— 501-766 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LITTLEROCK AR
— 501-767 not yet reported which blocks → SOUTHWESTERN BELL 9533 HOTSPRINGS AR
— 501-771 3XXX which blocks → SOUTHWESTERN BELL 9533 LITTLEROCK AR

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/30/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.