NumberResearch Membership · Data 09/23/2026

Recent prefix assignments

338 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/23/2026

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. 39
ONVOY, LLC - CA 27
NEW CINGULAR WIRELESS PCS, LLC - IL 27
NEW CINGULAR WIRELESS PCS, LLC - DC 26
ONVOY, LLC - NJ 15
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
2011-12-20 724-442 0–9 XXXall 10 · 5 holders which blocks → WINDSTREAM PENNSYLVANIA, INC. 0176 FREDONIA PA
2011-12-20 778-700 not yet reported which blocks → Videotron Ltd. 383F Victoria —
2011-12-20 801-919 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 PROVO UT
2011-12-20 832-571 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 HOUSTON TX
2011-12-19 224-214 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WAUKEGAN IL
2011-12-19 234-202 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 MANCHESTR OH
2011-12-19 330-290 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CORTLAND OH
2011-12-19 330-890 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 NO CANTON OH
2011-12-19 336-360 0–9 XXXall 10 · 5 holders which blocks → PAETEC ITEL, LLC 829J RAMSEUR NC
2011-12-19 530-461 0XXX1XXX2XXX3XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → AT&T ENTERPRISES, LLC 516C BANGOR CA
2011-12-19 602-419 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 PHOENIX AZ
2011-12-19 602-425 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 PHOENIX AZ
2011-12-19 614-609 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 GROVEPORT OH
2011-12-19 803-248 4XXX7XXX8XXX · 3 holders which blocks → WINDSTREAM SOUTH CAROLINA, INC. 0517 KERSHAW SC
2011-12-19 808-312 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 TELECOM OF HAWAII, LP - HI 8297 HONOLULU HI
2011-12-16 206-639 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - WA 483E SEATTLE WA
2011-12-16 289-302 not yet reported which blocks → Iristel Inc. 154E Niagara Falls —
2011-12-16 409-263 0–9 XXXall 10 · 4 holders which blocks → AT&T ENTERPRISES, LLC 516C SOUTHVIDOR TX
2011-12-16 509-822 0–9 XXXall 10 · 8 holders which blocks → ONVOY, LLC - WA 483E SPOKANE WA
2011-12-16 708-304 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 6 holders which blocks → COMCAST IP PHONE, LLC 318J CRETE IL
2011-12-16 717-839 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HARISBGZN1 PA
2011-12-16 778-286 not yet reported which blocks → Bell West Inc. 2933 Yarrow —
2011-12-16 778-287 not yet reported which blocks → Bell West Inc. 2933 Sardis —
2011-12-16 778-289 not yet reported which blocks → Bell West Inc. 2933 Fort Langley —
2011-12-16 778-402 not yet reported which blocks → Iristel Inc. 154E Victoria —
2011-12-14 208-789 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - ID 689F BOISE ID
2011-12-14 226-270 not yet reported which blocks → Iristel Inc. 154E London —
2011-12-14 385-215 0–9 XXXall 10 · 6 holders which blocks → NUSO, LLC 551G SALT LAKE UT
2011-12-14 401-479 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - RI 6389 PROVIDENCE RI
2011-12-14 401-601 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - RI 6389 PROVIDENCE RI
2011-12-14 613-901 not yet reported which blocks → Bell Canada 8051 Ottawa-Hull —
2011-12-14 613-904 not yet reported which blocks → Bell Canada 8051 Ottawa-Hull —
2011-12-14 709-701 not yet reported which blocks → Iristel Inc. 154E St. John's —
2011-12-14 709-702 not yet reported which blocks → Iristel Inc. 154E St. John's —
2011-12-14 775-360 0–9 XXXall 10 · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NV 4805 RENO NV
2011-12-14 801-441 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - UT 871E SALT LAKE UT
2011-12-13 201-630 0–9 XXXall 10 · 6 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NJ 6623 JERSEYCITY NJ
2011-12-13 201-904 0–9 XXXall 10 · 6 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NJ 6623 WYCKOFF NJ
2011-12-13 205-209 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AL 6804 BIRMINGHAM AL
2011-12-13 276-288 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - VA 8825 WOOLWINE VA
2011-12-13 289-827 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Hamilton —
2011-12-13 352-203 0–9 XXXall 10 · 8 holders which blocks → METROPCS, INC. 5562 BELLEVIEW FL
2011-12-13 405-675 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 OKLA CITY OK
2011-12-13 418-437 not yet reported which blocks → Telecommunications Xittel Inc 247F Chicoutimi —
2011-12-13 504-563 0–9 XXXwhole prefix which blocks → VOICESTREAM GSM I, LLC 150C NEWORLEANS LA
2011-12-13 516-514 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 NASSAUZN02 NY
2011-12-13 581-265 not yet reported which blocks → Telecommunications Xittel Inc 247F Alma —
2011-12-13 587-956 not yet reported which blocks → TELUS 8084 Calgary —
2011-12-13 862-231 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NJ 6623 NEWARK NJ
2011-12-13 917-768 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E NWYRCYZN01 NY

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/23/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.