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
— 405-883 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → PAETEC ITEL, LLC 829J PIEDMONT OK
— 405-884 not yet reported which blocks → PIONEER TEL. COOP., INC. 2018 GEARY OK
— 405-888 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OK 5257 EDMOND OK
— 405-893 not yet reported which blocks → PIONEER TEL. COOP., INC. 2018 CALUMET OK
— 405-895 not yet reported which blocks → SOUTHWESTERN BELL 9533 MOORE OK
— 405-899 not yet reported which blocks → POTTAWATOMIE TEL. CO. 2020 TRIBBEY OK
— 405-904 not yet reported which blocks → SPOK, INC. 6630 OKLA CITY OK
— 405-909 not yet reported which blocks → PAGE PLUS, INC. 9671 MOORE OK
— 405-910 not yet reported which blocks → PAGE PLUS, INC. 9671 MOORE OK
— 405-911 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX OK
— 405-912 not yet reported which blocks → SOUTHWESTERN BELL 9533 MOORE OK
— 405-917 not yet reported which blocks → SOUTHWESTERN BELL 9533 OKLA CITY OK
— 405-918 not yet reported which blocks → OK
— 405-919 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 OKLA CITY OK
— 405-921 0XXX which blocks → T-MOBILE USA, INC. 6529 OKLA CITY OK
— 405-922 0XXX which blocks → T-MOBILE USA, INC. 6529 OKLA CITY OK
— 405-923 0XXX which blocks → T-MOBILE USA, INC. 6529 OKLA CITY OK
— 405-924 0XXX2XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 OKLA CITY OK
— 405-928 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → PAETEC ITEL, LLC 829J NORMAN OK
— 405-929 none assigned yet which blocks → HINTON TEL. CO. OF HINTON OK, INC. 1995 COLONY OK
— 405-932 not yet reported which blocks → VALOR TELECOM TX.LP-OK DBA WINDSTREAM COMM SW 1165 PADEN OK
— 405-936 4XXX7XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 BRITTON OK
— 405-940 not yet reported which blocks → PAGE PLUS, INC. 9671 MOORE OK
— 405-941 not yet reported which blocks → POTTAWATOMIE TEL. CO. 2020 SASAKWA OK
— 405-942 not yet reported which blocks → SOUTHWESTERN BELL 9533 OKLA CITY OK
— 405-943 not yet reported which blocks → SOUTHWESTERN BELL 9533 OKLA CITY OK
— 405-944 0XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → SOUTHWESTERN BELL 9533 CROMWELL OK
— 405-945 not yet reported which blocks → SOUTHWESTERN BELL 9533 OKLA CITY OK
— 405-946 not yet reported which blocks → SOUTHWESTERN BELL 9533 OKLA CITY OK
— 405-947 none assigned yet which blocks → SOUTHWESTERN BELL 9533 OKLA CITY OK
— 405-948 not yet reported which blocks → SOUTHWESTERN BELL 9533 OKLA CITY OK
— 405-949 not yet reported which blocks → SOUTHWESTERN BELL 9533 OKLA CITY OK
— 405-950 not yet reported which blocks → OK
— 405-951 not yet reported which blocks → SOUTHWESTERN BELL 9533 OKLA CITY OK
— 405-952 0XXX4XXX7XXX9XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 HINTON OK
— 405-954 not yet reported which blocks → SOUTHWESTERN BELL 9533 OKLA CITY OK
— 405-958 not yet reported which blocks → OK
— 405-959 not yet reported which blocks → OK
— 405-962 5XXX8XXX9XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 OKLA CITY OK
— 405-964 not yet reported which blocks → MCLOUD TEL. CO. 2006 MCLOUD OK
— 405-966 1XXX9XXX · 2 holders which blocks → OKLAHOMA COMMUNICATION SYSTEM, INC. 1984 GRACEMONT OK
— 405-969 not yet reported which blocks → PIONEER TEL. COOP., INC. 2018 CRESCENT OK
— 405-971 4XXX which blocks → SOUTHWESTERN BELL 9533 OKLA CITY OK
— 405-972 3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → SOUTHWESTERN BELL 9533 BETHANY OK
— 405-973 4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 OKLA CITY OK
— 405-974 0XXX1XXX8XXX9XXX · 3 holders which blocks → SOUTHWESTERN BELL 9533 OKLA CITY OK
— 405-975 not yet reported which blocks → PAGE PLUS, INC. 9671 OKLA CITY OK
— 405-976 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX OK
— 405-979 0XXX3XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 OKLA CITY OK
— 405-980 not yet reported which blocks → SPOK, INC. 6630 OKLA CITY OK

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.