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 540
VERIZON VIRGINIA, INC. 156
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 79
NEW CINGULAR WIRELESS PCS, LLC - DC 66
OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 64
LEVEL 3 COMMUNICATIONS, LLC - VA 50
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
2023-09-28 540-826 9XXX which blocks → AT&T - LOCAL 7421 WASHINGTON VA
2023-09-21 540-703 2XXX which blocks → ONVOY, LLC - VA 138E STONE MT VA
2023-09-12 540-571 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 FREDECKSBG VA
2023-08-10 540-276 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 BEDFORD VA
2023-08-10 540-995 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 2 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 PULASKI VA
2023-08-05 540-540 0XXX2XXX4XXX5XXX7XXX8XXX · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H GLASGOW VA
2023-08-05 540-804 0XXX1XXX4XXX7XXX · 4 holders which blocks → ONVOY SPECTRUM, LLC 624H SHAWSVILLE VA
2023-06-26 540-757 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 2 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 CHRISTISBG VA
2022-04-14 540-936 0XXX1XXX3XXX · 2 holders which blocks → TWILIO INTERNATIONAL, INC. 506J HARRISONBG VA
2022-04-13 540-978 0XXX1XXX2XXX9XXX · 3 holders which blocks → FRACTEL, LLC 965H LURAY VA
2022-04-08 540-971 7XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - VA 8825 EDINBURG VA
2022-03-09 540-957 0XXX2XXX3XXX4XXX5XXX6XXX8XXX · 5 holders which blocks → ONVOY, LLC - VA 138E BUENAVISTA VA
2022-03-09 540-964 9XXX which blocks → BOOST SUBSCRIBERCO L.L.C. 490J HARRISONBG VA
2022-02-08 540-606 0–9 XXXall 10 · 4 holders which blocks → TELNYX LLC 073H ELKTON VA
2022-02-08 540-956 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - VA 138E STONE MT VA
2022-01-11 540-203 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - VA 138E CHANCELLOR VA
2022-01-11 540-876 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - VA 138E CHRISTISBG VA
2021-12-08 540-934 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - VA 138E BLACKSBURG VA
2021-12-08 540-938 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 MINERAL VA
2021-11-10 540-304 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - VA 138E REMINGTON VA
2021-11-10 540-963 0XXX1XXX2XXX5XXX6XXX7XXX · 3 holders which blocks → ONVOY, LLC - VA 138E TROUTVILLE VA
2021-10-08 540-873 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 STAFFORD VA
2021-10-08 540-914 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 FRONTROYAL VA
2021-09-09 540-756 1XXX2XXX5XXX6XXX7XXX · 3 holders which blocks → COMCAST IP PHONE, LLC 318J MADISON VA
2021-09-09 540-770 0XXX1XXX8XXX9XXX · 2 holders which blocks → PEERLESS NETWORK OF VIRGINIA, LLC - VA 275G HARRISONBG VA
2021-07-12 540-906 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 PEARISBURG VA
2021-05-14 540-813 0–9 XXXall 10 · 4 holders which blocks → UNITED STATES CELLULAR - VA 6283 DUBLIN VA
2021-05-05 540-807 0–9 XXXall 10 · 5 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 LOUISA VA
2021-04-30 540-861 0–9 XXXall 10 · 4 holders which blocks → TELNYX LLC 073H SALEM VA
2021-04-26 540-796 0–9 XXXall 10 · 4 holders which blocks → HD CARRIER LLC 321J HARTWOOD VA
2021-04-26 540-806 0–9 XXXall 10 · 6 holders which blocks → HD CARRIER LLC 321J RADFORD VA
2021-04-24 540-913 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WINCHESTER VA
2021-04-22 540-803 0–9 XXXwhole prefix which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 STAFFORD VA
2021-04-15 540-919 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - VA 138E FREDECKSBG VA
2021-04-14 540-762 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 CHRISTISBG VA
2021-03-17 540-794 0–9 XXXall 10 · 2 holders which blocks → STRATUS NETWORKS 495J ROANOKE VA
2021-02-05 540-670 0–9 XXXall 10 · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H FREDECKSBG VA
2021-01-25 540-979 0–9 XXXall 10 · 2 holders which blocks → HD CARRIER LLC 321J ROANOKE VA
2021-01-19 540-768 0–9 XXXall 10 · 5 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 SPOTSYLVAN VA
2021-01-11 540-704 0XXX1XXX2XXX3XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H HARRISONBG VA
2020-11-24 540-734 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 CHANCELLOR VA
2020-11-23 540-714 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WARRENTON VA
2020-10-08 540-823 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 FRONTROYAL VA
2020-10-02 540-824 0–9 XXXall 10 · 4 holders which blocks → NUSO, LLC 478J BLACKSBURG VA
2020-09-30 540-617 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - VA 079F CHRISTISBG VA
2020-09-29 540-618 0–9 XXXall 10 · 4 holders which blocks → HD CARRIER LLC 321J CULPEPER VA
2020-09-28 540-790 0–9 XXXall 10 · 4 holders which blocks → AIRESPRING, INC. 996H ROANOKE VA
2020-09-08 540-647 0–9 XXXall 10 · 5 holders which blocks → IP HORIZON LLC 515J ROANOKE VA
2020-09-08 540-930 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - VA 138E STAFFORD VA
2020-08-25 540-821 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - VA 8825 BERRYVILLE VA

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.