NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

355 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026

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. 38
ONVOY, LLC - CA 31
NEW CINGULAR WIRELESS PCS, LLC - IL 28
NEW CINGULAR WIRELESS PCS, LLC - DC 26
ONVOY, LLC - NJ 18
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
2023-06-13 438-543 not yet reported which blocks → Videotron Ltd. 328F Montreal —
2023-06-13 531-326 0–9 XXXall 10 · 3 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 COLUMBUS NE
2023-06-13 559-848 7XXX8XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 WOODLAKE CA
2023-06-13 740-220 0XXX1XXX8XXX9XXX · 3 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K SHAWNEE OH
2023-06-13 754-316 0–9 XXXall 10 · 2 holders which blocks → CABLEVISION LIGHTPATH, LLC 472K FTLAUDERDL FL
2023-06-13 763-388 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MN 5816 TWINCITIES MN
2023-06-13 779-309 0XXX which blocks → BOOST SUBSCRIBERCO L.L.C. 490J SO SHARON IL
2023-06-13 803-303 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 BATESBURG SC
2023-06-13 803-839 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 NEWBERRY SC
2023-06-13 843-704 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 MONCKS COR SC
2023-06-13 845-329 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 MAHOPAC NY
2023-06-13 913-429 0–9 XXXwhole prefix which blocks → AERIAL COMMUNICATIONS, INC. 6701 GARDNER KS
2023-06-13 938-214 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 RUSSELLVL AL
2023-06-12 236-242 not yet reported which blocks → Iristel Inc. 154E Abbotsford —
2023-06-12 236-834 not yet reported which blocks → Iristel Inc. 154E Salmon Arm —
2023-06-12 346-674 0–9 XXXwhole prefix which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 HOUSTON TX
2023-06-12 365-609 not yet reported which blocks → Iristel Inc. 154E Fort Erie —
2023-06-12 385-540 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 AMERCNFORK UT
2023-06-12 480-954 0–9 XXXwhole prefix which blocks → ONVOY SPECTRUM, LLC 624H PHOENIX AZ
2023-06-12 501-536 0–9 XXXall 10 · 7 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 CONWAY AR
2023-06-12 561-787 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 WPALMBEACH FL
2023-06-12 602-823 0–9 XXXwhole prefix which blocks → ONVOY SPECTRUM, LLC 624H PHOENIX AZ
2023-06-12 618-951 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HERRIN IL
2023-06-12 623-309 0–9 XXXall 10 · 4 holders which blocks → ONVOY SPECTRUM, LLC 624H PHOENIX AZ
2023-06-12 709-508 not yet reported which blocks → Iristel Inc. 154E Carbonear —
2023-06-12 719-512 0–9 XXXall 10 · 2 holders which blocks → NUSO, LLC 732J COLORDOSPG CO
2023-06-12 754-305 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 DEERFLDBCH FL
2023-06-12 772-290 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - FL 8300 VERO BEACH FL
2023-06-12 786-945 0–9 XXXall 10 · 2 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - FL 8300 MIAMI FL
2023-06-12 807-809 not yet reported which blocks → Iristel Inc. 154E Hudson —
2023-06-12 807-908 not yet reported which blocks → Iristel Inc. 154E Devlin —
2023-06-12 863-264 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 LAKE WALES FL
2023-06-12 912-723 0XXX1XXX2XXX8XXX · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - GA 983E METTER GA
2023-06-12 917-203 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC- NY 384C NWYRCYZN14 NY
2023-06-12 984-332 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 RALEIGH NC
2023-06-12 984-334 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 SANFORD NC
2023-06-09 283-200 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - OH 464C TRENTON OH
2023-06-09 283-201 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - OH 464C CLERMONT OH
2023-06-09 283-202 0–9 XXXwhole prefix which blocks → ONVOY, LLC - OH 464C MORROW OH
2023-06-09 307-418 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 JACKSON WY
2023-06-09 325-337 0XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 NORTON TX
2023-06-09 340-212 not yet reported which blocks → COMCAST IP PHONE, LLC 318J CHTAMSTTHS VI
2023-06-09 385-536 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SALT LAKE UT
2023-06-09 385-537 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 AMERCNFORK UT
2023-06-09 513-606 0XXX1XXX2XXX3XXX8XXX9XXX · 5 holders which blocks → ONVOY, LLC - OH 464C MONROE OH
2023-06-09 513-927 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - OH 464C MIDDLETOWN OH
2023-06-09 662-919 9XXX which blocks → ONVOY SPECTRUM, LLC 624H SHUQUALAK MS
2023-06-09 683-801 not yet reported which blocks → Iristel Inc. 154E Algoma Mills —
2023-06-09 701-602 0XXX1XXX8XXX9XXX · 3 holders which blocks → NUSO, LLC 732J DICKINSON ND
2023-06-09 732-633 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NEWBRNSWCK NJ

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.