NumberResearch Membership · Data 09/21/2026

Recent prefix assignments

338 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/21/2026

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. 38
NEW CINGULAR WIRELESS PCS, LLC - IL 28
ONVOY, LLC - CA 26
NEW CINGULAR WIRELESS PCS, LLC - DC 26
ONVOY, LLC - NJ 18
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
2023-01-23 548-323 not yet reported which blocks → Bell Mobility 6574 Port Elgin —
2023-01-23 564-238 0XXX2XXX3XXX4XXX5XXX9XXX · 3 holders which blocks → ONVOY, LLC - WA 483E PORT ORCH WA
2023-01-23 564-242 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - WA 483E MARYSVILLE WA
2023-01-23 689-291 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - FL 982E WINTERPARK FL
2023-01-20 225-521 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - LA 749E BATONROUGE LA
2023-01-20 334-861 0–9 XXXall 10 · 2 holders which blocks → POWERTEL BIRMINGHAM LICENSES, INC. 7475 EUFAULA AL
2023-01-20 346-676 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - TX 903C KEMAH TX
2023-01-20 385-538 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - UT 871E AMERCNFORK UT
2023-01-20 432-372 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - TX 903C KERMIT TX
2023-01-20 445-277 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - PA 002F PHLDLPHZN3 PA
2023-01-20 501-531 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - AR 196F HOTSPRINGS AR
2023-01-20 551-369 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - NJ 118F TEANECK NJ
2023-01-20 726-266 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - TX 903C SANANTONIO TX
2023-01-20 742-743 not yet reported which blocks → Fibernetics Corporation 464D Bradford —
2023-01-20 742-744 not yet reported which blocks → Fibernetics Corporation 464D Tottenham —
2023-01-20 805-970 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - CA 649C CAMARILLO CA
2023-01-20 806-816 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7148 SHAMROCK TX
2023-01-20 816-543 0–9 XXXall 10 · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 KANSASCITY MO
2023-01-20 848-343 0–9 XXXall 10 · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - NJ 7142 WOODBRIDGE NJ
2023-01-20 858-398 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - CA 649C SNDG MRMS CA
2023-01-20 863-359 0–9 XXXall 10 · 5 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 AVON PARK FL
2023-01-20 864-410 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - SC 077F SPARTANBG SC
2023-01-20 912-672 0–9 XXXall 10 · 5 holders which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 BRUNSWICK GA
2023-01-20 945-287 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F PLANO TX
2023-01-20 945-288 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F IRVING TX
2023-01-20 956-705 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F PHARR TX
2023-01-19 213-635 0–9 XXXall 10 · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 LSAN DA 04 CA
2023-01-19 229-564 0–9 XXXwhole prefix which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 AMERICUS GA
2023-01-19 251-426 0–9 XXXall 10 · 2 holders which blocks → AIRUS, INC. - AL 476H MOBILE AL
2023-01-19 334-859 0–9 XXXall 10 · 4 holders which blocks → AIRUS, INC. - AL 476H MONTGOMERY AL
2023-01-19 430-313 0XXX3XXX6XXX · 3 holders which blocks → CSC VOICE, LLC 612K WINFIELD TX
2023-01-19 502-729 0XXX1XXX2XXX9XXX · 4 holders which blocks → ONVOY, LLC - KY 896E MOUNT EDEN KY
2023-01-19 539-379 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → ONVOY, LLC - OK 409F COLLINSVL OK
2023-01-19 571-607 0–9 XXXwhole prefix which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WSNGTNZN08 VA
2023-01-19 571-608 0–9 XXXwhole prefix which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WSNGTNZN08 VA
2023-01-19 571-610 0–9 XXXwhole prefix which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WSNGTNZN08 VA
2023-01-19 571-613 0–9 XXXwhole prefix which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WSNGTNZN08 VA
2023-01-19 571-614 0–9 XXXwhole prefix which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WSNGTNZN08 VA
2023-01-19 683-685 not yet reported which blocks → Fibernetics Corporation 464D Orillia —
2023-01-19 683-686 not yet reported which blocks → Fibernetics Corporation 464D Wasaga Beach —
2023-01-19 747-331 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 GLENDALE CA
2023-01-19 762-340 0–9 XXXwhole prefix which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 COMMERCE GA
2023-01-19 779-362 7XXX which blocks → ONVOY, LLC 224C FAIRBURY IL
2023-01-19 925-506 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 ANTIOCH CA
2023-01-19 938-389 0XXX3XXX4XXX · 2 holders which blocks → ONVOY, LLC - AL 604E WEDOWEE AL
2023-01-19 986-980 0XXX which blocks → COMMIO, LLC 939H PARMA ID
2023-01-18 276-726 0XXX1XXX2XXX6XXX7XXX · 3 holders which blocks → ONVOY, LLC - VA 138E DWIGHT VA
2023-01-18 346-634 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CYPRESS TX
2023-01-18 350-205 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → COMCAST PHONE OF CALIFORNIA, LLC 394L PLANADA CA
2023-01-18 430-310 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LINDL SWAN TX

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.