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
2016-01-22 873-770 not yet reported which blocks → Iristel Inc. 154E Val-D'Or —
2016-01-22 954-350 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - FL 937C HOLLYWOOD FL
2016-01-21 206-482 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SEATTLE WA
2016-01-21 253-433 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 TACOMA WA
2016-01-21 336-930 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - NC 638E WINSTN SAL NC
2016-01-21 581-205 not yet reported which blocks → Iristel Inc. 154E Alma —
2016-01-21 581-801 not yet reported which blocks → Iristel Inc. 154E Riviere-du-Loup —
2016-01-21 586-842 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MT CLEMENS MI
2016-01-21 629-702 0–9 XXXall 10 · 4 holders which blocks → COMCAST IP PHONE, LLC 318J NASHVILLE TN
2016-01-21 647-570 not yet reported which blocks → Videotron Ltd. 787G Toronto —
2016-01-21 901-930 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 MEMPHIS TN
2016-01-21 939-383 0–9 XXXall 10 · 2 holders which blocks → LIBERTY MOBILE PUERTO RICO INC. 639J BAYAMONNOR PR
2016-01-20 314-376 0–9 XXXall 10 · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO 7432 ST LOUIS MO
2016-01-20 365-301 not yet reported which blocks → Distributel 082E Freelton —
2016-01-20 365-302 not yet reported which blocks → Distributel 082E Georgetown —
2016-01-20 365-303 not yet reported which blocks → Distributel 082E Milton —
2016-01-20 365-304 not yet reported which blocks → Distributel 082E Campbellville —
2016-01-20 412-214 0–9 XXXall 10 · 8 holders which blocks → WIDE VOICE, LLC - PA 218H PTTSBGZON8 PA
2016-01-20 425-426 0–9 XXXall 10 · 5 holders which blocks → WIDE VOICE, LLC - WA 707G EVERETT WA
2016-01-20 541-666 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 ALBANY OR
2016-01-20 561-567 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - FL 937C WPALMBEACH FL
2016-01-20 626-727 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - CA 649C COVINA CA
2016-01-20 657-387 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - CA 649C YORBALINDA CA
2016-01-20 803-991 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - SC 548E NO AUGUSTA SC
2016-01-20 808-657 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 HILO HI
2016-01-20 904-661 0–9 XXXall 10 · 8 holders which blocks → ONVOY, LLC - FL 937C JACKSONVL FL
2016-01-20 909-318 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - CA 649C BIGBEAR LK CA
2016-01-20 913-249 0–9 XXXall 10 · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - KS 7593 KANSASCITY KS
2016-01-20 954-939 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - FL 937C FTLAUDERDL FL
2016-01-20 956-715 0–9 XXXall 10 · 2 holders which blocks → METROPCS, INC. 5562 PHARR TX
2016-01-19 204-900 not yet reported which blocks → Iristel Inc. 154E Oakbank —
2016-01-19 210-974 0–9 XXXall 10 · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7138 SANANTONIO TX
2016-01-19 210-982 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - TX 903C SANANTONIO TX
2016-01-19 352-661 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 WILDWOOD FL
2016-01-19 352-805 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 LEESBURG FL
2016-01-19 407-725 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 WINTERPARK FL
2016-01-19 431-400 not yet reported which blocks → Iristel Inc. 154E Portage La Prairie —
2016-01-19 506-499 not yet reported which blocks → Iristel Inc. 154E Bathurst —
2016-01-19 561-631 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 WPALMBEACH FL
2016-01-19 775-515 0–9 XXXall 10 · 7 holders which blocks → T-MOBILE USA, INC. 6529 CARSONCITY NV
2016-01-19 778-769 not yet reported which blocks → Iristel Inc. 154E Abbotsford —
2016-01-19 786-910 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 MIAMI FL
2016-01-18 331-716 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC 224C WHEATON IL
2016-01-18 331-717 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 OSWEGO IL
2016-01-18 346-717 0–9 XXXwhole prefix which blocks → AERIAL COMMUNICATIONS, INC. 6701 BAMMEL TX
2016-01-18 469-820 0–9 XXXall 10 · 8 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7148 RED OAK TX
2016-01-18 657-297 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - CA 649C SILVERADO CA
2016-01-18 682-715 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GLENDALE TX
2016-01-18 682-716 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 ARLINGTON TX
2016-01-18 702-820 0–9 XXXall 10 · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NV 9145 LAS VEGAS NV

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.