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
2020-08-17 581-618 not yet reported which blocks → ISP Telecom Inc. 4727 St-Fereol —
2020-08-17 581-619 not yet reported which blocks → ISP Telecom Inc. 4727 Ste-Anne-de-Beaupre —
2020-08-17 636-201 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WARRENTON MO
2020-08-17 639-551 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Moose Jaw —
2020-08-17 639-552 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Moose Jaw —
2020-08-17 681-286 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HNTNGTNZN1 WV
2020-08-17 720-615 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - CO 078F KEENESBURG CO
2020-08-17 720-752 0–9 XXXwhole prefix which blocks → LEVEL 3 COMMUNICATIONS, LLC - CO 6118 DENVER CO
2020-08-17 743-218 0–9 XXXall 10 · 8 holders which blocks → METROPCS, INC. 5562 GIBSONVL NC
2020-08-17 810-254 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E GRANDBLANC MI
2020-08-17 947-226 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 AUBURN HTS MI
2020-08-17 980-334 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 CONCORD NC
2020-08-14 202-998 0–9 XXXwhole prefix which blocks → ONVOY, LLC - DC 850D WSHNGTNZN1 DC
2020-08-14 209-703 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 TUOLUMNE CA
2020-08-14 210-891 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F SANANTONIO TX
2020-08-14 217-961 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC 224C MATTOON IL
2020-08-14 326-697 0–9 XXXall 10 · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J ENGLEWOOD OH
2020-08-14 332-373 0–9 XXXall 10 · 4 holders which blocks → CORETEL NEW YORK, INC. - NY 1215 NWYRCYZN01 NY
2020-08-14 332-895 0–9 XXXall 10 · 3 holders which blocks → TWILIO INTERNATIONAL, INC. 506J NWYRCYZN01 NY
2020-08-14 343-578 not yet reported which blocks → ISP Telecom Inc. 4727 Harrowsmith —
2020-08-14 352-662 0–9 XXXall 10 · 5 holders which blocks → TWILIO INTERNATIONAL, INC. 506J BELLEVIEW FL
2020-08-14 365-277 not yet reported which blocks → ISP Telecom Inc. 4727 Campbellville —
2020-08-14 365-278 not yet reported which blocks → ISP Telecom Inc. 4727 Freelton —
2020-08-14 386-377 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → ONVOY, LLC - FL 937C WELAKA FL
2020-08-14 409-667 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H GALVESTON TX
2020-08-14 430-999 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H ATLANTA TX
2020-08-14 469-871 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F JOSEPHINE TX
2020-08-14 479-396 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FAYETTEVL AR
2020-08-14 513-750 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - OH 001F CLERMONT OH
2020-08-14 680-895 0–9 XXXall 10 · 5 holders which blocks → TWILIO INTERNATIONAL, INC. 506J SYRACUSE NY
2020-08-14 707-612 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SANTA ROSA CA
2020-08-14 713-913 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F BARKER TX
2020-08-14 716-617 0–9 XXXall 10 · 5 holders which blocks → TWILIO INTERNATIONAL, INC. 506J BUFFALO NY
2020-08-14 726-300 0–9 XXXall 10 · 2 holders which blocks → FRACTEL, LLC 965H SANANTONIO TX
2020-08-14 754-348 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H HOLLYWOOD FL
2020-08-14 786-922 0–9 XXXall 10 · 2 holders which blocks → FRACTEL, LLC 965H NORTH DADE FL
2020-08-14 838-895 0–9 XXXall 10 · 2 holders which blocks → TWILIO INTERNATIONAL, INC. 506J ALBANY NY
2020-08-14 854-895 0–9 XXXall 10 · 3 holders which blocks → TWILIO INTERNATIONAL, INC. 506J CHARLESTON SC
2020-08-14 856-410 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HADDONFLD NJ
2020-08-14 864-794 0–9 XXXall 10 · 3 holders which blocks → TWILIO INTERNATIONAL, INC. 506J GREENVILLE SC
2020-08-14 903-222 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → FRACTEL, LLC 965H BELLSSAVOY TX
2020-08-14 903-333 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H JEWETT TX
2020-08-14 903-444 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H SHERMAN TX
2020-08-14 908-401 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ELIZABETH NJ
2020-08-14 915-348 0–9 XXXall 10 · 2 holders which blocks → FRACTEL, LLC 965H EL PASO TX
2020-08-14 954-466 0–9 XXXall 10 · 2 holders which blocks → FRACTEL, LLC 965H FTLAUDERDL FL
2020-08-14 954-824 0–9 XXXall 10 · 3 holders which blocks → TWILIO INTERNATIONAL, INC. 506J FTLAUDERDL FL
2020-08-13 262-266 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WI 5489 OCONOMOWOC WI
2020-08-13 309-803 1XXX2XXX3XXX6XXX7XXX · 3 holders which blocks → NUSO, LLC 478J CANTON IL
2020-08-13 332-236 0–9 XXXall 10 · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 NWYRCYZN01 NY

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.