NumberResearch Membership · Data 09/23/2026

Recent prefix assignments

338 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/23/2026

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. 39
ONVOY, LLC - CA 27
NEW CINGULAR WIRELESS PCS, LLC - IL 27
NEW CINGULAR WIRELESS PCS, LLC - DC 26
ONVOY, LLC - NJ 15
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
2004-07-13 250-666 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Grand Forks —
2004-07-13 352-308 0–9 XXXall 10 · 5 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 EUSTIS FL
2004-07-13 403-369 not yet reported which blocks → TELUS Mobility 8301 Calgary —
2004-07-13 617-301 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 CAMBRIDGE MA
2004-07-13 660-973 8XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 CHILLICOTH MO
2004-07-13 778-284 not yet reported which blocks → Bell West Inc. 2933 Port Coquitlam —
2004-07-13 813-217 0–9 XXXall 10 · 5 holders which blocks → PAETEC ITEL, LLC 829J TAMPACEN FL
2004-07-12 201-705 0–9 XXXall 10 · 3 holders which blocks → PAETEC ITEL, LLC 829J JERSEYCITY NJ
2004-07-12 231-268 0XXX2XXX3XXX4XXX5XXX6XXX7XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 CHEBOYGAN MI
2004-07-12 315-805 0XXX1XXX2XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NY 4006 OWASCO NY
2004-07-12 732-917 0–9 XXXall 10 · 5 holders which blocks → PAETEC ITEL, LLC 829J NEWBRNSWCK NJ
2004-07-12 803-719 0–9 XXXall 10 · 4 holders which blocks → PAETEC ITEL, LLC 829J COLUMBIA SC
2004-07-12 845-605 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NY 4006 MILLBROOK NY
2004-07-09 248-794 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLCV - MI 543C SOUTHFIELD MI
2004-07-09 440-226 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CHARDON OH
2004-07-08 229-210 0–9 XXXall 10 · 3 holders which blocks → SOUTHERN COMMUNICATIONS SERVICES, INC. 6744 ARLINGTON GA
2004-07-08 336-617 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 TELECOM OF NORTH CAROLINA, LP - NC 7973 GREENSBORO NC
2004-07-08 347-278 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN06 NY
2004-07-08 505-406 not yet reported which blocks → SMITH BAGLEY INC. DBA CELLULAR ONE OF NE ARIZONA 4146 SHIPROCK NM
2004-07-08 505-713 not yet reported which blocks → SMITH BAGLEY INC. DBA CELLULAR ONE OF NE ARIZONA 4146 GALLUP NM
2004-07-08 646-962 0–9 XXXwhole prefix which blocks → PAETEC ITEL, LLC 829J NWYRCYZN01 NY
2004-07-08 716-238 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BUFFALO NY
2004-07-08 912-208 0–9 XXXall 10 · 5 holders which blocks → SOUTHERN COMMUNICATIONS SERVICES, INC. 6744 BLACKSHEAR GA
2004-07-08 912-209 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → SOUTHERN COMMUNICATIONS SERVICES, INC. 6744 HAZLEHURST GA
2004-07-07 321-202 0–9 XXXall 10 · 2 holders which blocks → LEVEL 3 TELECOM OF FLORIDA, LP - FL 7635 ORLANDO FL
2004-07-07 818-684 0–9 XXXwhole prefix which blocks → PACIFIC BELL 9740 NO HOLLYWD CA
2004-07-07 845-834 0–9 XXXall 10 · 8 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NY 4006 HIGHLAND NY
2004-07-07 904-216 0–9 XXXwhole prefix which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 JACKSONVL FL
2004-07-07 954-208 0–9 XXXall 10 · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - FL 4802 FTLAUDERDL FL
2004-07-06 217-565 0XXX1XXX2XXX3XXX5XXX8XXX9XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 TAYLORVL IL
2004-07-06 330-977 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 HIRAM OH
2004-07-06 715-410 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HUDSON WI
2004-07-02 507-891 0XXX1XXX2XXX · 3 holders which blocks → MCC TELEPHONY OF MINNESOTA, LLC - MN 719F MANTORVL MN
2004-07-02 601-476 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → SOUTHERN COMMUNICATIONS SERVICES, INC. 6744 WIGGINS MS
2004-07-02 601-803 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 TYLERTOWN MS
2004-07-02 931-462 not yet reported which blocks → TWIN LAKES TEL. COOP. CORP. 0579 LIVINGSTON TN
2004-07-01 208-451 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 GRANGEVL ID
2004-07-01 251-259 0–9 XXXall 10 · 3 holders which blocks → ELISKA WIRELESS VENTURES SUBSIDIARY I, LLC 6916 MOBILE AL
2004-07-01 352-270 0–9 XXXall 10 · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 BEVERLYHLS FL
2004-07-01 502-303 0–9 XXXall 10 · 2 holders which blocks → POWERTEL KENTUCKY LICENSES, INC. 365C LOUISVILLE KY
2004-07-01 716-241 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NY 4006 GOWANDA NY
2004-07-01 845-684 0–9 XXXall 10 · 8 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NY 4006 WOODSTOCK NY
2004-07-01 850-360 0–9 XXXall 10 · 7 holders which blocks → AT&T - LOCAL 7421 GRACEVILLE FL
2004-07-01 916-293 0–9 XXXall 10 · 7 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 FOLSOM CA
2004-07-01 919-415 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 TELECOM OF NORTH CAROLINA, LP - NC 7555 CARY NC
2004-07-01 931-452 0XXX1XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TN 4806 LYNNVILLE TN
2004-07-01 973-250 0–9 XXXall 10 · 8 holders which blocks → COOPERATIVE COMMUNICATIONS, INC. 8407 BRANCHVL NJ
2004-06-30 229-206 9XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA 6540 SYLVESTER GA
2004-06-30 403-429 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Rocky Mountain House —
2004-06-30 403-635 not yet reported which blocks → TELUS Mobility 8301 Lethbridge —

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/23/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.