NumberResearch Membership · Data 09/21/2026

Recent prefix assignments

338 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/21/2026

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
2011-01-19 412-315 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PTTSBGZON1 PA
2011-01-19 651-900 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MN 5816 TWINCITIES MN
2011-01-19 801-500 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 PROVO UT
2011-01-18 208-505 0–9 XXXall 10 · 6 holders which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7865 NAMPA ID
2011-01-18 469-500 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MCKINNEY TX
2011-01-18 512-994 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 AUSTIN TX
2011-01-18 587-789 not yet reported which blocks → Distributel 081E Lloydminster —
2011-01-18 587-790 not yet reported which blocks → Distributel 081E Vegreville —
2011-01-18 587-791 not yet reported which blocks → Distributel 081E Wainwright —
2011-01-18 587-792 not yet reported which blocks → Distributel 081E Bonnyville —
2011-01-18 587-793 not yet reported which blocks → Distributel 081E Vulcan —
2011-01-18 682-300 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ARLINGTON TX
2011-01-18 779-200 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 ROCKFORD IL
2011-01-18 936-900 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CONROE TX
2011-01-17 204-450 not yet reported which blocks → MTS Inc. 991B St. Theresa Point —
2011-01-17 315-760 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 SYRACUSE NY
2011-01-17 347-794 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN07 NY
2011-01-17 516-399 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 NASSAUZN04 NY
2011-01-17 703-949 0–9 XXXall 10 · 6 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - DC 7529 HERNDON VA
2011-01-17 775-525 0–9 XXXall 10 · 4 holders which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 187G RENO NV
2011-01-17 786-383 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 MIAMI FL
2011-01-17 786-518 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 MIAMI FL
2011-01-17 786-519 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 MIAMI FL
2011-01-17 786-531 0–9 XXXwhole prefix which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 MIAMI FL
2011-01-17 786-548 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 MIAMI FL
2011-01-17 786-691 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 MIAMI FL
2011-01-17 918-804 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 TULSA OK
2011-01-14 226-312 not yet reported which blocks → Distributel 082E Chatham —
2011-01-14 226-313 not yet reported which blocks → Distributel 082E Sarnia —
2011-01-14 226-427 not yet reported which blocks → Bragg Communications Inc. 4878 Glencoe —
2011-01-14 267-844 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS ENTERPRISES, LP 6626 PHLDLPHZN2 PA
2011-01-14 347-805 0–9 XXXwhole prefix which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN03 NY
2011-01-14 418-741 not yet reported which blocks → Distributel 083E Levis —
2011-01-14 516-366 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E NASSAUZN09 NY
2011-01-14 636-439 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 OFALLON MO
2011-01-14 705-954 not yet reported which blocks → Bragg Communications Inc. 4878 Bridgenorth —
2011-01-14 705-964 not yet reported which blocks → Bragg Communications Inc. 4878 Cannington —
2011-01-14 705-972 not yet reported which blocks → Bragg Communications Inc. 4878 Woodville —
2011-01-14 705-973 not yet reported which blocks → Bragg Communications Inc. 4878 Sunderland —
2011-01-14 705-974 not yet reported which blocks → Bragg Communications Inc. 4878 Omemee —
2011-01-14 778-447 not yet reported which blocks → Bragg Communications Inc. 4878 Princeton —
2011-01-14 778-448 not yet reported which blocks → Bragg Communications Inc. 4878 Keremeos —
2011-01-14 819-870 not yet reported which blocks → Distributel 083E Drummondville —
2011-01-14 832-506 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HOUSTON TX
2011-01-14 832-580 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 DICKINSON TX
2011-01-13 289-399 not yet reported which blocks → TELUS Integrated Communications 2782 Richmond Hill —
2011-01-13 317-900 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 NOBLESVL IN
2011-01-13 320-500 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MN 5816 ORTONVILLE MN
2011-01-13 620-400 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → SOUTHWESTERN BELL 9533 GREAT BEND KS
2011-01-13 651-800 0–9 XXXall 10 · 7 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MN 5816 RED WING MN

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.