NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

338 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
NEW CINGULAR WIRELESS PCS, LLC - IL 28
ONVOY, LLC - CA 26
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
2023-02-22 437-858 not yet reported which blocks → Fido Solutions Inc. 5643 Toronto —
2023-02-22 437-868 not yet reported which blocks → Fido Solutions Inc. 5643 Toronto —
2023-02-22 437-878 not yet reported which blocks → Fido Solutions Inc. 5643 Toronto —
2023-02-22 437-933 not yet reported which blocks → Fido Solutions Inc. 5643 Toronto —
2023-02-22 437-955 not yet reported which blocks → Fido Solutions Inc. 5643 Toronto —
2023-02-22 437-966 not yet reported which blocks → Fido Solutions Inc. 5643 Toronto —
2023-02-22 437-977 not yet reported which blocks → Fido Solutions Inc. 5643 Toronto —
2023-02-22 472-212 0–9 XXXall 10 · 3 holders which blocks → NUSO, LLC 732J WILMINGTON NC
2023-02-22 472-213 0–9 XXXall 10 · 4 holders which blocks → COMCAST IP PHONE, LLC 318J WILMINGTON NC
2023-02-22 479-499 6XXX9XXX · 2 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - AR 802C BELLEVILLE AR
2023-02-22 515-425 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - IA 221F AMES IA
2023-02-22 615-954 0–9 XXXwhole prefix which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN 7977 NASHVILLE TN
2023-02-22 689-296 0–9 XXXwhole prefix which blocks → AERIAL COMMUNICATIONS, INC. 6701 KISSIMMEE FL
2023-02-22 689-297 0–9 XXXwhole prefix which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 ORLANDO FL
2023-02-22 689-298 0–9 XXXwhole prefix which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 ORLANDO FL
2023-02-22 715-974 0XXX6XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 BARRON WI
2023-02-22 743-257 0–9 XXXall 10 · 4 holders which blocks → NUSO, LLC 732J WINSTN SAL NC
2023-02-22 743-258 0–9 XXXall 10 · 4 holders which blocks → COMCAST IP PHONE, LLC 318J GREENSBORO NC
2023-02-22 765-797 9XXX which blocks → BOOST SUBSCRIBERCO L.L.C. 490J DARLINGTON IN
2023-02-22 828-636 0–9 XXXall 10 · 3 holders which blocks → NUSO, LLC 732J HENDERSNVL NC
2023-02-22 854-239 0–9 XXXall 10 · 4 holders which blocks → COMCAST IP PHONE, LLC 318J FLORENCE SC
2023-02-22 864-816 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 2 holders which blocks → COMCAST IP PHONE, LLC 318J GREENVILLE SC
2023-02-22 980-413 0–9 XXXall 10 · 4 holders which blocks → NUSO, LLC 732J CHARLOTTE NC
2023-02-22 980-418 0–9 XXXall 10 · 2 holders which blocks → COMCAST IP PHONE, LLC 318J CHARLOTTE NC
2023-02-22 984-324 0XXX1XXX2XXX3XXX7XXX8XXX9XXX · 2 holders which blocks → NUSO, LLC 732J WAKEFOREST NC
2023-02-22 984-325 0–9 XXXall 10 · 2 holders which blocks → COMCAST IP PHONE, LLC 318J RALEIGH NC
2023-02-21 223-307 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 LANCASTER PA
2023-02-21 308-408 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → ONVOY SPECTRUM, LLC 624H LEXINGTON NE
2023-02-21 313-708 0–9 XXXall 10 · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H DETROITZN2 MI
2023-02-21 313-787 0–9 XXXall 10 · 4 holders which blocks → ONVOY SPECTRUM, LLC 624H DETROITZN6 MI
2023-02-21 351-239 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 LOWELL MA
2023-02-21 380-259 0–9 XXXall 10 · 6 holders which blocks → NUSO, LLC 732J WESTERVL OH
2023-02-21 567-396 0–9 XXXall 10 · 3 holders which blocks → NUSO, LLC 732J HOLLAND OH
2023-02-21 586-358 0–9 XXXall 10 · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H UTICA MI
2023-02-21 650-820 0–9 XXXall 10 · 4 holders which blocks → ONVOY SPECTRUM, LLC 624H REDWOOD CY CA
2023-02-21 848-838 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - NJ 637C PERTHAMBOY NJ
2023-02-21 901-695 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - TN 525E MEMPHIS TN
2023-02-21 943-217 0–9 XXXwhole prefix which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - GA 7435 BUFORD GA
2023-02-21 949-849 0–9 XXXall 10 · 5 holders which blocks → ONVOY SPECTRUM, LLC 624H NEWPORTBCH CA
2023-02-20 216-516 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - OH 464C CLEVELAND OH
2023-02-17 229-572 0–9 XXXall 10 · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H FITZGERALD GA
2023-02-17 315-917 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → NORTHLAND NETWORKS, LTD. - NY 7556 UTICA NY
2023-02-17 319-391 0–9 XXXall 10 · 4 holders which blocks → NUSO, LLC 732J CEDAR RPDS IA
2023-02-17 341-228 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FRNK MAIN CA
2023-02-17 352-776 0–9 XXXall 10 · 3 holders which blocks → NUSO, LLC 732J GAINESVL FL
2023-02-17 352-779 0–9 XXXall 10 · 5 holders which blocks → NUSO, LLC 732J OCALA FL
2023-02-17 386-357 0–9 XXXall 10 · 4 holders which blocks → NUSO, LLC 732J LAKE CITY FL
2023-02-17 386-359 0–9 XXXall 10 · 5 holders which blocks → NUSO, LLC 732J PALM COAST FL
2023-02-17 406-507 0XXX1XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MT 9415 WHITEFISH MT
2023-02-17 412-764 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - PA 547E PTTSBGZON4 PA

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.