NumberResearch Membership · Data 09/25/2026

Recent prefix assignments

358 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/25/2026

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. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 31
ONVOY, LLC - CA 27
NEW CINGULAR WIRELESS PCS, LLC - IL 27
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
2022-06-30 639-853 not yet reported which blocks → ISP Telecom Inc. 4727 Fort Qu'Appelle —
2022-06-30 639-854 not yet reported which blocks → ISP Telecom Inc. 4727 Kipling —
2022-06-30 672-867 not yet reported which blocks → Fibernetics Corporation 464D Vancouver —
2022-06-30 858-321 0–9 XXXall 10 · 4 holders which blocks → PAETEC ITEL, LLC 829J SNDG SNDG CA
2022-06-30 873-287 not yet reported which blocks → ISP Telecom Inc. 4727 St-Donat-de-Montcalm —
2022-06-30 931-367 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 CLARKSVL TN
2022-06-29 213-609 0–9 XXXall 10 · 4 holders which blocks → U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J LSAN DA 09 CA
2022-06-29 240-930 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 LAUREL238 MD
2022-06-29 279-225 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SCRM NORTH CA
2022-06-29 302-412 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - DE 073F LEWES DE
2022-06-29 321-429 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - FL 982E MELBOURNE FL
2022-06-29 337-799 0–9 XXXall 10 · 2 holders which blocks → TERRA NOVA TELECOM INC. 145J LAFAYETTE LA
2022-06-29 346-564 0–9 XXXwhole prefix which blocks → AERIAL COMMUNICATIONS, INC. 6701 HOUSTON TX
2022-06-29 346-565 0–9 XXXwhole prefix which blocks → AERIAL COMMUNICATIONS, INC. 6701 HOUSTON TX
2022-06-29 424-474 0–9 XXXall 10 · 4 holders which blocks → U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J CULVERCITY CA
2022-06-29 435-288 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 ST GEORGE UT
2022-06-29 442-374 0XXX1XXX2XXX3XXX7XXX · 3 holders which blocks → COMMIO, LLC 939H FALLBROOK CA
2022-06-29 442-376 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J ESCONDIDO CA
2022-06-29 442-383 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J DSERTHTSPG CA
2022-06-29 480-873 0–9 XXXall 10 · 2 holders which blocks → QWEST CORPORATION 9636 PHOENIX AZ
2022-06-29 504-422 0–9 XXXall 10 · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H NEWORLEANS LA
2022-06-29 530-705 0XXX4XXX7XXX · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E CHALLENGE CA
2022-06-29 530-769 0XXX which blocks → COMMIO, LLC 939H HOOPA CA
2022-06-29 530-791 0–9 XXXall 10 · 2 holders which blocks → U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J ANDERSON CA
2022-06-29 530-808 0–9 XXXall 10 · 4 holders which blocks → U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J DAVIS CA
2022-06-29 530-810 0–9 XXXall 10 · 5 holders which blocks → U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J BIGGS CA
2022-06-29 530-834 0XXX1XXX7XXX8XXX · 3 holders which blocks → U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J GRVY MAIN CA
2022-06-29 567-389 0–9 XXXall 10 · 3 holders which blocks → PAETEC ITEL, LLC 829J TOLEDO OH
2022-06-29 651-391 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 TWINCITIES MN
2022-06-29 657-605 0–9 XXXall 10 · 4 holders which blocks → U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J ORANGE CA
2022-06-29 661-590 0XXX1XXX2XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J WASCO CA
2022-06-29 669-314 0–9 XXXall 10 · 5 holders which blocks → U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SUNNYVALE CA
2022-06-29 669-316 0–9 XXXall 10 · 4 holders which blocks → U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J CAMPBELL CA
2022-06-29 763-353 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MN 5816 TWINCITIES MN
2022-06-29 771-213 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 WSHNGTNZN1 DC
2022-06-29 820-208 0–9 XXXall 10 · 4 holders which blocks → U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J ATASCADERO CA
2022-06-29 910-732 1XXX which blocks → TWC IP ENABLED SERVICES, LLC 793K FAIR BLUFF NC
2022-06-29 910-943 0XXX1XXX5XXX · 3 holders which blocks → CSC VOICE, LLC 612K NEWTON GRV NC
2022-06-29 915-306 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 CANUTILLO TX
2022-06-29 925-441 0–9 XXXall 10 · 4 holders which blocks → U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J ANTIOCH CA
2022-06-29 949-693 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - CA 649C TRABUCO CA
2022-06-29 949-703 0–9 XXXall 10 · 4 holders which blocks → U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J IRVINE CA
2022-06-29 949-710 0–9 XXXall 10 · 3 holders which blocks → U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J CAPITRNVLY CA
2022-06-29 954-936 0–9 XXXwhole prefix which blocks → BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL 9417 HOLLYWOOD FL
2022-06-28 346-562 0–9 XXXwhole prefix which blocks → AERIAL COMMUNICATIONS, INC. 6701 HOUSTON TX
2022-06-28 346-563 0–9 XXXwhole prefix which blocks → AERIAL COMMUNICATIONS, INC. 6701 HOUSTON TX
2022-06-28 709-201 not yet reported which blocks → Distributel 081E Burin —
2022-06-28 709-202 not yet reported which blocks → Distributel 081E Carbonear —
2022-06-28 709-203 not yet reported which blocks → Distributel 081E Clarenville —
2022-06-28 709-204 not yet reported which blocks → Distributel 081E Fermeuse —

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/25/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.