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
2018-02-23 628-262 0–9 XXXall 10 · 5 holders which blocks → EXIANT COMMUNICATIONS LLC 114J BELVEDERE CA
2018-02-23 708-553 0–9 XXXall 10 · 4 holders which blocks → EXIANT COMMUNICATIONS LLC 114J CICERO IL
2018-02-23 858-648 0–9 XXXall 10 · 3 holders which blocks → EXIANT COMMUNICATIONS LLC 114J POWAY CA
2018-02-23 940-248 0–9 XXXall 10 · 4 holders which blocks → EXIANT COMMUNICATIONS LLC 114J AUBREY TX
2018-02-22 272-216 0–9 XXXall 10 · 5 holders which blocks → PEERLESS NETWORK OF PENNSYLVANIA, LLC - PA 967E HONESDALE PA
2018-02-22 346-332 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - TX 903C CYPRESS TX
2018-02-22 352-531 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 LEESBURG FL
2018-02-22 385-337 0–9 XXXall 10 · 7 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 MIDVALE UT
2018-02-22 438-853 not yet reported which blocks → Bell Mobility 6574 Montreal —
2018-02-22 463-207 0–9 XXXall 10 · 5 holders which blocks → TELNYX LLC 073H INDIANAPLS IN
2018-02-22 513-506 0–9 XXXall 10 · 4 holders which blocks → PEERLESS NETWORK OF OHIO, LLC - OH 284F MONROE OH
2018-02-22 531-277 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - NE 7144 OMAHA NE
2018-02-22 531-335 0–9 XXXall 10 · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WEST POINT NE
2018-02-22 606-727 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - KY 4369 PIKEVILLE KY
2018-02-22 616-428 0–9 XXXwhole prefix which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J GRAND RPDS MI
2018-02-22 737-250 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → ONVOY, LLC - TX 903C MARTINDALE TX
2018-02-22 779-249 0–9 XXXall 10 · 7 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 DWIGHT IL
2018-02-22 825-334 not yet reported which blocks → Bell Mobility 6574 Calgary —
2018-02-22 825-822 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Calgary —
2018-02-22 825-882 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Calgary —
2018-02-22 825-883 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Calgary —
2018-02-22 825-885 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Calgary —
2018-02-22 936-306 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - TX 903C NAVASOTA TX
2018-02-22 937-897 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - OH 464C SIDNEY OH
2018-02-22 972-936 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7148 DALLAS TX
2018-02-21 215-532 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PHPHSBZN43 PA
2018-02-21 272-214 1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA 7434 CLARKSSMMT PA
2018-02-21 272-215 0–9 XXXall 10 · 4 holders which blocks → PEERLESS NETWORK OF PENNSYLVANIA, LLC - PA 967E WILLIAMSPT PA
2018-02-21 318-252 0–9 XXXwhole prefix which blocks → ONVOY, LLC - LA 749E HOMER LA
2018-02-21 365-228 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Oakville —
2018-02-21 365-338 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Oakville —
2018-02-21 417-409 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - MO 093F SPRINGFLD MO
2018-02-21 475-244 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - CT 639C CHESHIRE CT
2018-02-21 506-288 not yet reported which blocks → Rogers Communications Canada Inc. (Cable) 743B Saint John —
2018-02-21 873-878 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Sherbrooke —
2018-02-20 307-409 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 LA GRANGE WY
2018-02-20 510-603 0–9 XXXall 10 · 4 holders which blocks → COMCAST PHONE OF CALIFORNIA, LLC 394L OKLD FRTVL CA
2018-02-20 581-563 not yet reported which blocks → Videotron Ltd. 8306 Saint-Ubalde —
2018-02-20 601-521 0–9 XXXall 10 · 3 holders which blocks → AIRUS, INC. - MS 459H MADISON MS
2018-02-20 734-724 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLCV - MI 543C DEXTER MI
2018-02-20 802-471 0–9 XXXall 10 · 4 holders which blocks → AIRUS, INC. - VT 665H VERGENNES VT
2018-02-20 813-652 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - FL 937C PLANT CITY FL
2018-02-20 838-201 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC- NY 384C HOOSICKFLS NY
2018-02-20 845-409 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC- NY 384C SHOKAN NY
2018-02-20 989-898 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLCV - MI 543C MIDLAND MI
2018-02-19 916-406 0–9 XXXall 10 · 4 holders which blocks → CONSOLIDATED COMMUNICATIONS OF CALIFORNIA COMPANY 2334 RSVL MAIN CA
2018-02-16 207-519 0XXX1XXX2XXX9XXX · 2 holders which blocks → PEERLESS NETWORK OF MAINE, LLC- ME 925H SOUTHWEHBR ME
2018-02-16 207-705 0–9 XXXall 10 · 6 holders which blocks → PEERLESS NETWORK OF MAINE, LLC- ME 925H LEWISTON ME
2018-02-16 207-962 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 3 holders which blocks → PEERLESS NETWORK OF MAINE, LLC- ME 925H ORONO ME
2018-02-16 225-403 1XXX6XXX8XXX9XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 DUTCH TOWN LA

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.