NumberResearch Membership · Data 09/26/2026

Recent prefix assignments

360 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/26/2026

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
ONVOY, LLC - CA 26
NEW CINGULAR WIRELESS PCS, LLC - IL 26
Rogers Communications Canada Inc. (Wireless) 23
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
Download CSV ↓
Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2021-09-20 580-702 none assigned yet which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 OAK HILL OK
2021-09-20 580-915 none assigned yet which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HOCHATOWN OK
2021-09-20 603-850 0XXX3XXX8XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 LISBON NH
2021-09-20 682-359 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GLENDALE TX
2021-09-20 707-913 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 NAPA CA
2021-09-20 786-824 0–9 XXXwhole prefix which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 MIAMI FL
2021-09-20 786-825 0–9 XXXwhole prefix which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 MIAMI FL
2021-09-20 845-872 0XXX which blocks → SKYE TELECOM LLC DBA SKYETEL 622J POUGHKEPSI NY
2021-09-20 872-289 0–9 XXXall 10 · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - IL 7136 CHICGOZN01 IL
2021-09-20 878-822 0XXX1XXX2XXX3XXX4XXX8XXX9XXX · 5 holders which blocks → SKYE TELECOM LLC DBA SKYETEL 622J BUTLER PA
2021-09-17 269-354 2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 SAUGATUCK MI
2021-09-17 314-937 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SAPPINGTON MO
2021-09-17 351-221 0–9 XXXall 10 · 5 holders which blocks → COMMIO, LLC 939H LOWELL MA
2021-09-17 438-463 not yet reported which blocks → Bell Mobility 6574 Montreal —
2021-09-17 442-655 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 SAN MARCOS CA
2021-09-17 517-744 0XXX1XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → SKYE TELECOM LLC DBA SKYETEL 622J LANSING MI
2021-09-17 539-259 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 NASHOBA OK
2021-09-17 562-571 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 DOWNEY CA
2021-09-17 563-626 2XXX6XXX · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J HARPESFRRY IA
2021-09-17 607-409 0XXX3XXX4XXX6XXX7XXX9XXX · 5 holders which blocks → VONAGE AMERICA LLC 197D WATKISGLEN NY
2021-09-17 616-699 0–9 XXXall 10 · 6 holders which blocks → SKYE TELECOM LLC DBA SKYETEL 622J GRAND RPDS MI
2021-09-17 619-963 0–9 XXXall 10 · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNDG SNDG CA
2021-09-17 715-980 0XXX1XXX3XXX8XXX9XXX · 5 holders which blocks → UNITED STATES CELLULAR - WI 6274 WHITEHALL WI
2021-09-17 716-538 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NIAGARAFLS NY
2021-09-17 734-880 0XXX8XXX · 2 holders which blocks → SKYE TELECOM LLC DBA SKYETEL 622J NOSYLVANIA MI
2021-09-17 747-397 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J SNFN SPLV CA
2021-09-17 786-821 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 MIAMI FL
2021-09-17 808-210 0–9 XXXall 10 · 5 holders which blocks → IP HORIZON LLC 515J HONOLULU HI
2021-09-17 808-404 0–9 XXXall 10 · 4 holders which blocks → SKYE TELECOM LLC DBA SKYETEL 622J HONOLULU HI
2021-09-17 831-282 0–9 XXXall 10 · 2 holders which blocks → IP HORIZON LLC 515J MONTEREY CA
2021-09-17 845-870 0–9 XXXall 10 · 7 holders which blocks → PAETEC ITEL, LLC 829J NEWBURGH NY
2021-09-17 904-750 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - FL 937C JACKSONVL FL
2021-09-17 906-333 3XXX which blocks → SKYE TELECOM LLC DBA SKYETEL 622J MARQUETTE MI
2021-09-17 925-897 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 DUBLN-SNRM CA
2021-09-17 952-251 0–9 XXXwhole prefix which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J TWINCITIES MN
2021-09-17 980-899 0–9 XXXall 10 · 3 holders which blocks → SKYE TELECOM LLC DBA SKYETEL 622J CHARLOTTE NC
2021-09-17 984-844 0–9 XXXall 10 · 2 holders which blocks → SKYE TELECOM LLC DBA SKYETEL 622J RALEIGH NC
2021-09-17 989-990 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → SKYE TELECOM LLC DBA SKYETEL 622J SAGINAW MI
2021-09-16 215-250 0–9 XXXwhole prefix which blocks → ONVOY SPECTRUM, LLC 624H PHLDLPHZN2 PA
2021-09-16 215-714 0–9 XXXwhole prefix which blocks → ONVOY, LLC - PA 547E PHLDLPHZN2 PA
2021-09-16 225-895 0–9 XXXall 10 · 4 holders which blocks → TWILIO INTERNATIONAL, INC. 506J BATONROUGE LA
2021-09-16 231-968 0XXX1XXX2XXX3XXX4XXX8XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - MI 991E CADILLAC MI
2021-09-16 234-327 0–9 XXXall 10 · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H AKRON OH
2021-09-16 262-294 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 LAKEGENEVA WI
2021-09-16 305-391 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - FL 937C KEYS FL
2021-09-16 308-460 2XXX4XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PALMER NE
2021-09-16 309-901 9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LITTLETON IL
2021-09-16 341-699 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H OKLD MN-PD CA
2021-09-16 346-503 0–9 XXXwhole prefix which blocks → AERIAL COMMUNICATIONS, INC. 6701 HOUSTON TX
2021-09-16 346-504 0–9 XXXwhole prefix which blocks → AERIAL COMMUNICATIONS, INC. 6701 HOUSTON TX

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/26/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.