NumberResearch Membership · Data 09/29/2026

Recent prefix assignments

347 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/29/2026

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 28
Rogers Communications Canada Inc. (Wireless) 23
NEW CINGULAR WIRELESS PCS, LLC - IL 23
ONVOY, LLC - CA 19
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
2019-06-20 509-905 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WA 6121 PASCO WA
2019-06-20 531-239 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 OMAHA NE
2019-06-20 531-867 0–9 XXXall 10 · 6 holders which blocks → COMMIO, LLC 939H OMAHA NE
2019-06-20 657-386 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2019-06-20 680-215 0–9 XXXall 10 · 7 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E NEWARK NY
2019-06-20 681-270 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - WV 449F TERRA ALTA WV
2019-06-20 681-900 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - WV 449F HEDGESVL WV
2019-06-20 720-677 0–9 XXXwhole prefix which blocks → ONVOY, LLC - CO 026D DENVER CO
2019-06-20 720-712 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - CO 078F FORTLUPTON CO
2019-06-20 774-393 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - MA 990E SHREWSBURY MA
2019-06-20 813-568 0–9 XXXall 10 · 5 holders which blocks → VOIP INNOVATIONS, LLC 597F TAMPACEN FL
2019-06-20 816-327 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → CSC WIRELESS, LLC 425J AGENCY MO
2019-06-20 848-274 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - NJ 118F FRANKLINPK NJ
2019-06-20 864-544 0XXX2XXX4XXX5XXX · 4 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K LOCKHART SC
2019-06-19 239-977 0–9 XXXall 10 · 2 holders which blocks → FRACTEL, LLC 965H NO NAPLES FL
2019-06-19 425-403 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 KIRKLAND WA
2019-06-19 469-670 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 GRANDPRARI TX
2019-06-19 509-401 0XXX3XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 POMEROY WA
2019-06-19 509-975 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 PASCO WA
2019-06-19 605-705 0–9 XXXall 10 · 5 holders which blocks → COMMIO, LLC 939H SIOUX FLS SD
2019-06-19 667-268 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - MD 071F DARLINGTON MD
2019-06-19 732-209 0–9 XXXall 10 · 5 holders which blocks → CSC WIRELESS, LLC 425J BOUNDBROOK NJ
2019-06-19 786-770 0–9 XXXall 10 · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H MIAMI FL
2019-06-19 816-722 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 ST JOSEPH MO
2019-06-19 862-346 0–9 XXXall 10 · 5 holders which blocks → CSC WIRELESS, LLC 425J BUTLER NJ
2019-06-18 205-829 0–9 XXXall 10 · 4 holders which blocks → VOIP INNOVATIONS, LLC 597F BIRMINGHAM AL
2019-06-18 205-839 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - AL 604E CARROLLTON AL
2019-06-18 205-843 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - AL 604E EUTAW AL
2019-06-18 205-846 0–9 XXXwhole prefix which blocks → ONVOY, LLC - AL 604E LIVINGSTON AL
2019-06-18 205-851 0–9 XXXwhole prefix which blocks → ONVOY, LLC - AL 604E MONTEVALLO AL
2019-06-18 205-852 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - AL 604E PINSON AL
2019-06-18 205-890 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - AL 604E ALICEVILLE AL
2019-06-18 205-891 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - AL 604E BRILLIANT AL
2019-06-18 207-813 0–9 XXXall 10 · 6 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K ELLSWORTH ME
2019-06-18 226-687 not yet reported which blocks → Gosfield North Communication Co-operative Ltd. 117H Comber —
2019-06-18 226-736 not yet reported which blocks → Gosfield North Communication Co-operative Ltd. 117H Kingsville —
2019-06-18 226-956 not yet reported which blocks → TELUS Integrated Communications 2782 St. Thomas —
2019-06-18 256-210 0–9 XXXall 10 · 3 holders which blocks → VOIP INNOVATIONS, LLC 597F HUNTSVILLE AL
2019-06-18 307-443 3XXX4XXX5XXX6XXX · 2 holders which blocks → COMMIO, LLC 939H CHEYENNE WY
2019-06-18 318-693 0–9 XXXall 10 · 3 holders which blocks → VOIP INNOVATIONS, LLC 597F SHREVEPORT LA
2019-06-18 346-456 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - TX 903C MANVEL TX
2019-06-18 346-567 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - TX 903C MONTBLVIEU TX
2019-06-18 352-565 0–9 XXXall 10 · 5 holders which blocks → VOIP INNOVATIONS, LLC 597F GAINESVL FL
2019-06-18 365-256 not yet reported which blocks → TELUS Integrated Communications 2782 Castlemore —
2019-06-18 365-257 not yet reported which blocks → TELUS Integrated Communications 2782 Snelgrove —
2019-06-18 365-258 not yet reported which blocks → TELUS Integrated Communications 2782 Victoria —
2019-06-18 385-401 0–9 XXXall 10 · 3 holders which blocks → VOIP INNOVATIONS, LLC 597F SALT LAKE UT
2019-06-18 424-440 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 W ANGELES CA
2019-06-18 563-337 2XXX3XXX6XXX7XXX · 3 holders which blocks → HAWKEYE INTERCONNECT COMPANY - IA 429J FAYETTE IA
2019-06-18 580-645 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - OK 119F ADA OK

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/29/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.