NumberResearch Membership · Data 09/27/2026

Recent prefix assignments

334 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/27/2026

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
Download CSV ↓
Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2005-03-30 423-845 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 BRISTOL TN
2005-03-30 450-214 not yet reported which blocks → Videotron Ltd. 8306 St-Calixte-de-Kilkenny —
2005-03-30 450-215 not yet reported which blocks → Videotron Ltd. 8306 St-Lin —
2005-03-30 615-691 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 MURFREESBO TN
2005-03-30 646-624 0–9 XXXall 10 · 5 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN01 NY
2005-03-30 662-765 1XXX2XXX9XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J STARKVILLE MS
2005-03-30 909-684 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 FONTANA CA
2005-03-30 951-445 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 MURRIETA CA
2005-03-29 215-207 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 PHLDLPHZN1 PA
2005-03-29 404-604 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 ATLANTA GA
2005-03-29 518-705 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 JOHNSTOWN NY
2005-03-29 606-304 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 CORBIN KY
2005-03-29 618-240 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 MT CARMEL IL
2005-03-29 618-733 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F CARTERVL IL
2005-03-29 928-434 not yet reported which blocks → SMITH BAGLEY INC. DBA CELLULAR ONE OF NE ARIZONA 4146 SHOW LOW AZ
2005-03-28 210-818 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 SANANTONIO TX
2005-03-28 224-538 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 WAUKEGAN IL
2005-03-28 313-447 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN2 MI
2005-03-28 317-644 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - IN 097D INDIANAPLS IN
2005-03-28 540-308 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 ORANGE VA
2005-03-28 601-333 not yet reported which blocks → TELEPAK NETWORKS, INC. - MS 5278 FOREST MS
2005-03-28 601-548 not yet reported which blocks → TELEPAK NETWORKS, INC. - MS 5278 GLOSTER MS
2005-03-28 601-662 not yet reported which blocks → TELEPAK NETWORKS, INC. - MS 5278 DE KALB MS
2005-03-28 601-805 not yet reported which blocks → TELEPAK NETWORKS, INC. - MS 5278 CENTREVL MS
2005-03-28 601-820 not yet reported which blocks → TELEPAK NETWORKS, INC. - MS 5278 UNION MS
2005-03-28 601-836 not yet reported which blocks → TELEPAK NETWORKS, INC. - MS 5278 PHILA MS
2005-03-28 601-865 not yet reported which blocks → TELEPAK NETWORKS, INC. - MS 5278 WOODVILLE MS
2005-03-28 601-887 not yet reported which blocks → TELEPAK NETWORKS, INC. - MS 5278 NEWTONHKRY MS
2005-03-28 601-905 not yet reported which blocks → TELEPAK NETWORKS, INC. - MS 5278 PORTGIBSON MS
2005-03-28 601-972 not yet reported which blocks → TELEPAK NETWORKS, INC. - MS 5278 LIBERTY MS
2005-03-28 620-282 5XXX6XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - KS 6532 GREAT BEND KS
2005-03-28 662-777 not yet reported which blocks → TELEPAK NETWORKS, INC. - MS 5278 TUNICA MS
2005-03-28 678-897 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA 6540 GAINESVL GA
2005-03-28 703-955 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 HERNDON VA
2005-03-28 706-980 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA 6540 DALTON GA
2005-03-28 734-686 0–9 XXXall 10 · 3 holders which blocks → ACD TELECOM, INC. - MI 3535 ANN ARBOR MI
2005-03-28 757-350 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 EASTVILLE VA
2005-03-28 773-816 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 CHICGOZN10 IL
2005-03-28 773-987 0–9 XXXall 10 · 2 holders which blocks → FIRST COMMUNICATIONS, LLC 460K CHICGOZN10 IL
2005-03-28 904-369 0–9 XXXwhole prefix which blocks → LEVEL 3 TELECOM OF FLORIDA, LP - FL 7635 ORANGEPARK FL
2005-03-28 904-492 0–9 XXXwhole prefix which blocks → LEVEL 3 TELECOM OF FLORIDA, LP - FL 7635 PNTVDRABCH FL
2005-03-28 904-681 0–9 XXXwhole prefix which blocks → LEVEL 3 TELECOM OF FLORIDA, LP - FL 7635 JACKSOLBCH FL
2005-03-28 904-843 0–9 XXXwhole prefix which blocks → LEVEL 3 TELECOM OF FLORIDA, LP - FL 7635 MIDDLEBURG FL
2005-03-28 954-496 0–9 XXXall 10 · 3 holders which blocks → FUSION CLOUD SERVICES, LLC 206A FTLAUDERDL FL
2005-03-26 417-361 0XXX2XXX3XXX5XXX7XXX · 3 holders which blocks → MCC TELEPHONY LLC 593K EVERTON MO
2005-03-26 417-630 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 MARSHFIELD MO
2005-03-25 256-781 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - AL 5255 FRUITHURST AL
2005-03-25 256-906 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - AL 5255 RANBURNE AL
2005-03-25 508-322 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WAREHAM MA
2005-03-25 702-544 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 LAS VEGAS NV

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/27/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.