NumberResearch Membership · Data 09/28/2026

Recent prefix assignments

334 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/28/2026

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 26
Rogers Communications Canada Inc. (Wireless) 23
NEW CINGULAR WIRELESS PCS, LLC - IL 22
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
2020-06-15 367-777 not yet reported which blocks → TELUS Quebec 2243 Quebec —
2020-06-15 430-336 0XXX1XXX2XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H MERIT TX
2020-06-15 501-427 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 7 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - AR 802C MAUMELLE AR
2020-06-15 603-500 0XXX1XXX5XXX7XXX · 3 holders which blocks → FRACTEL, LLC 965H TILTON NH
2020-06-15 603-900 0XXX1XXX9XXX · 2 holders which blocks → FRACTEL, LLC 965H NEWPORT NH
2020-06-15 608-670 0XXX1XXX7XXX · 3 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K MOUNTHOREB WI
2020-06-15 715-960 0XXX which blocks → CHARTER IP ENABLED SERVICES, LLC 792K BRUCE WI
2020-06-15 775-460 0–9 XXXall 10 · 3 holders which blocks → PEERLESS NETWORK OF NEVADA, LLC - NV 408F RENO NV
2020-06-15 802-402 0XXX2XXX3XXX4XXX · 2 holders which blocks → ONVOY, LLC - VT 451F PROCTORSVL VT
2020-06-15 802-810 0XXX1XXX8XXX9XXX · 2 holders which blocks → ONVOY, LLC - VT 451F PERKINSVL VT
2020-06-15 848-290 0–9 XXXall 10 · 7 holders which blocks → CABLEVISION LIGHTPATH, INC. - NJ 4948 LAKEWOOD NJ
2020-06-15 873-636 not yet reported which blocks → TELUS Quebec 2243 Gatineau —
2020-06-15 873-637 not yet reported which blocks → TELUS Quebec 2243 St-Jovite —
2020-06-12 385-353 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 AMERCNFORK UT
2020-06-12 475-271 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - CT 639C MILFORD CT
2020-06-12 509-410 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - WA 483E PASCO WA
2020-06-12 616-310 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 7157 COOPERSVL MI
2020-06-12 657-443 0–9 XXXall 10 · 3 holders which blocks → VONAGE AMERICA LLC 197D WESTMINSTR CA
2020-06-12 701-515 0–9 XXXall 10 · 5 holders which blocks → PEERLESS NETWORK OF NORTH DAKOTA, LLC 460H FARGO ND
2020-06-12 705-354 not yet reported which blocks → IXICA Communications Inc. 812H Barrie —
2020-06-12 747-299 0–9 XXXall 10 · 3 holders which blocks → VONAGE AMERICA LLC 197D AGOURA CA
2020-06-12 873-634 not yet reported which blocks → TELUS Quebec 2243 Ottawa-Hull —
2020-06-12 909-808 0–9 XXXall 10 · 5 holders which blocks → VONAGE AMERICA LLC 197D FONTANA CA
2020-06-12 910-244 0XXX4XXX · 2 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K LISBON NC
2020-06-12 910-869 0XXX7XXX8XXX9XXX · 2 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K SOUTHRIVER NC
2020-06-12 959-251 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - CT 639C CANTON CT
2020-06-12 959-271 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → ONVOY, LLC - CT 639C PAWCATUCK CT
2020-06-12 959-955 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX · 4 holders which blocks → ONVOY, LLC - CT 639C KILLINGWTH CT
2020-06-12 959-991 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX · 2 holders which blocks → ONVOY, LLC - CT 639C CLINTON CT
2020-06-11 249-661 not yet reported which blocks → Fibernetics Corporation 464D Severn Bridge —
2020-06-11 249-662 not yet reported which blocks → Fibernetics Corporation 464D Stayner —
2020-06-11 249-663 not yet reported which blocks → Fibernetics Corporation 464D Cookstown —
2020-06-11 251-336 0XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H MONROEVL AL
2020-06-11 251-810 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - AL 604E GRAND BAY AL
2020-06-11 254-391 0–9 XXXall 10 · 6 holders which blocks → CSC WIRELESS, LLC 425J WACO TX
2020-06-11 262-578 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J ELKHORN WI
2020-06-11 365-306 not yet reported which blocks → Fibernetics Corporation 464D Castlemore —
2020-06-11 365-307 not yet reported which blocks → Fibernetics Corporation 464D Snelgrove —
2020-06-11 365-308 not yet reported which blocks → Fibernetics Corporation 464D Caledonia —
2020-06-11 365-309 not yet reported which blocks → Fibernetics Corporation 464D Grimsby —
2020-06-11 413-380 0XXX3XXX · 2 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K RICHMOND MA
2020-06-11 417-513 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 NEOSHO MO
2020-06-11 430-279 0XXX1XXX2XXX3XXX4XXX6XXX8XXX9XXX · 7 holders which blocks → FRACTEL, LLC 965H GORDONVL TX
2020-06-11 469-841 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GRANDPRARI TX
2020-06-11 475-445 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - CT 639C NEWTOWN CT
2020-06-11 475-501 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - CT 639C GEORGETOWN CT
2020-06-11 540-694 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - VA 8825 STEPHENSCY VA
2020-06-11 548-248 not yet reported which blocks → Fibernetics Corporation 464D Goderich —
2020-06-11 609-881 0–9 XXXwhole prefix which blocks → ONVOY, LLC - NJ 637C DENNISVL NJ
2020-06-11 657-440 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 ANAHEIM CA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/28/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.