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
2016-12-14 325-309 0–9 XXXall 10 · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 ALBANY TX
2016-12-14 385-429 0–9 XXXall 10 · 2 holders which blocks → TELNYX LLC 073H SALT LAKE UT
2016-12-14 405-653 0–9 XXXall 10 · 3 holders which blocks → TELNYX LLC 073H OKLA CITY OK
2016-12-14 440-872 0–9 XXXall 10 · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - OH 7532 TRINITY OH
2016-12-14 502-916 0–9 XXXall 10 · 5 holders which blocks → TELNYX LLC 073H LOUISVILLE KY
2016-12-14 504-618 0–9 XXXall 10 · 3 holders which blocks → TELNYX LLC 073H KENNER LA
2016-12-14 539-292 0–9 XXXall 10 · 4 holders which blocks → TELNYX LLC 073H TULSA OK
2016-12-14 720-572 0–9 XXXall 10 · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CO 7378 DENVER CO
2016-12-14 734-318 0–9 XXXall 10 · 4 holders which blocks → COMCAST IP PHONE, LLC 318J WYANDOTTE MI
2016-12-14 803-849 0–9 XXXall 10 · 5 holders which blocks → TELNYX LLC 073H COLUMBIA SC
2016-12-14 843-459 0–9 XXXall 10 · 7 holders which blocks → TELNYX LLC 073H CHARLESTON SC
2016-12-14 864-754 0–9 XXXall 10 · 6 holders which blocks → TELNYX LLC 073H SPARTANBG SC
2016-12-13 224-570 0–9 XXXall 10 · 4 holders which blocks → TELNYX LLC 073H WAUKEGAN IL
2016-12-13 309-571 0–9 XXXall 10 · 2 holders which blocks → TELNYX LLC 073H PEORIA IL
2016-12-13 352-651 0–9 XXXall 10 · 6 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 CRYSTALRIV FL
2016-12-13 386-400 0–9 XXXall 10 · 3 holders which blocks → TELNYX LLC 073H LAKE CITY FL
2016-12-13 407-751 0–9 XXXall 10 · 4 holders which blocks → TELNYX LLC 073H ORLANDO FL
2016-12-13 442-215 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 INDIO CA
2016-12-13 442-216 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 VISTA CA
2016-12-13 587-844 not yet reported which blocks → Iristel Inc. 154E Camrose —
2016-12-13 647-276 not yet reported which blocks → IXICA Communications Inc. 812H Toronto —
2016-12-13 708-840 0–9 XXXall 10 · 7 holders which blocks → T-MOBILE USA, INC. 6529 TINLEYPARK IL
2016-12-13 725-605 0–9 XXXall 10 · 4 holders which blocks → TELNYX LLC 073H LAS VEGAS NV
2016-12-13 754-225 0–9 XXXall 10 · 5 holders which blocks → TELNYX LLC 073H CORAL SPG FL
2016-12-13 778-486 not yet reported which blocks → Fibernetics Corporation 464D Victoria —
2016-12-13 848-257 0–9 XXXall 10 · 7 holders which blocks → CABLEVISION LIGHTPATH, INC. - NJ 4948 EATONTOWN NJ
2016-12-13 864-747 0–9 XXXall 10 · 3 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 GREENVILLE SC
2016-12-12 205-845 not yet reported which blocks → PINE BELT BROADCASTING DBA PINE BELT TEL COMP SVCS 9736 BUTLER AL
2016-12-12 224-605 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 ELGIN IL
2016-12-12 224-607 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 ARLIGTNHTS IL
2016-12-12 236-300 not yet reported which blocks → Iristel Inc. 154E Williams Lake —
2016-12-12 249-497 not yet reported which blocks → Iristel Inc. 154E Gore Bay —
2016-12-12 251-400 not yet reported which blocks → PINE BELT BROADCASTING DBA PINE BELT TEL COMP SVCS 9736 GROVE HILL AL
2016-12-12 346-360 0–9 XXXall 10 · 3 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 BAMMEL TX
2016-12-12 510-941 0–9 XXXall 10 · 5 holders which blocks → COMCAST PHONE OF CALIFORNIA, LLC 394L FRNK GRNLF CA
2016-12-12 620-533 0XXX5XXX · 2 holders which blocks → NEX-TECH WIRELESS, LLC 122D LITTLE RIV KS
2016-12-12 682-386 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 ARLINGTON TX
2016-12-12 952-234 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - MN 184D TWINCITIES MN
2016-12-09 321-503 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 COCOA FL
2016-12-09 407-799 0–9 XXXall 10 · 3 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 KISSIMMEE FL
2016-12-09 510-826 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 HAYWARD CA
2016-12-09 520-341 0–9 XXXall 10 · 6 holders which blocks → TELNYX LLC 073H NOGALES AZ
2016-12-09 581-805 not yet reported which blocks → Iristel Inc. 154E Rimouski —
2016-12-09 581-806 not yet reported which blocks → Iristel Inc. 154E Saint-Henri-de-Levis —
2016-12-09 581-807 not yet reported which blocks → Iristel Inc. 154E Montmagny —
2016-12-09 581-880 not yet reported which blocks → Iristel Inc. 154E Gaspe —
2016-12-09 605-560 0XXX1XXX · 2 holders which blocks → MCC TELEPHONY OF THE MID-WEST, LLC - SD 920F BROOKINGSR SD
2016-12-09 647-568 not yet reported which blocks → Videotron Ltd. 787G Toronto —
2016-12-09 719-374 0–9 XXXall 10 · 7 holders which blocks → TELNYX LLC 073H COLORDOSPG CO
2016-12-09 720-487 0–9 XXXall 10 · 3 holders which blocks → TELNYX LLC 073H LONGMONT CO

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.