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
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Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2005-04-26 228-707 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J PEARLINGTN MS
2005-04-26 228-901 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J HURLEY MS
2005-04-26 289-290 not yet reported which blocks → Zayo Canada Inc. 8304 Streetsville —
2005-04-26 318-743 0XXX2XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J DOYLINE LA
2005-04-26 318-905 0XXX1XXX3XXX4XXX5XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J BENTON LA
2005-04-26 318-909 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J HAUGHTON LA
2005-04-26 318-916 none assigned yet which blocks → PAETEC ITEL, LLC 829J MOORINGSPT LA
2005-04-26 319-327 0–9 XXXall 10 · 4 holders which blocks → UNITED STATES CELLULAR - IA 6266 INDEPNDNCE IA
2005-04-26 337-333 0XXX1XXX2XXX4XXX5XXX7XXX8XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J RAYNE LA
2005-04-26 337-803 0XXX1XXX2XXX3XXX4XXX8XXX · 5 holders which blocks → PAETEC ITEL, LLC 829J DUSON LA
2005-04-26 337-809 0XXX which blocks → PAETEC ITEL, LLC 829J FRANKLIN LA
2005-04-26 337-904 0XXX1XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → PAETEC ITEL, LLC 829J LOREAUVL LA
2005-04-26 337-915 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J CARENCRO LA
2005-04-26 337-917 5XXX7XXX8XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J ERATH LA
2005-04-26 403-536 not yet reported which blocks → Zayo Canada Inc. 8304 Calgary —
2005-04-26 615-681 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 GOODLETSVL TN
2005-04-26 647-258 not yet reported which blocks → Zayo Canada Inc. 8304 Toronto —
2005-04-26 780-289 not yet reported which blocks → TELUS Mobility 8301 Edmonton —
2005-04-26 819-674 not yet reported which blocks → TELUS Mobility 8303 Sherbrooke —
2005-04-26 985-305 1XXX2XXX3XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J PATTERSON LA
2005-04-25 256-222 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → PAETEC ITEL, LLC 829J SHEFFIELD AL
2005-04-25 302-543 0–9 XXXall 10 · 4 holders which blocks → VERIZON DELAWARE, INC. 9210 WILMINGTON DE
2005-04-25 336-754 0–9 XXXall 10 · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NC 7835 WALKERTOWN NC
2005-04-25 337-806 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 TELECOM OF LOUISIANA, LLC - LA 7488 LAFAYETTE LA
2005-04-25 601-843 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 DUFFEE MS
2005-04-25 601-907 1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 CROSSROADS MS
2005-04-24 254-677 0XXX1XXX2XXX3XXX4XXX5XXX · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F TEMPLE TX
2005-04-23 308-883 not yet reported which blocks → N.E. COLORADO CELLULAR, INC. 6874 IMPERIAL NE
2005-04-22 224-355 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 NORTHBROOK IL
2005-04-22 224-636 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 NORTHBROOK IL
2005-04-22 240-454 0–9 XXXall 10 · 5 holders which blocks → PAETEC ITEL, LLC 829J GAITHERSBG MD
2005-04-22 303-498 0–9 XXXall 10 · 5 holders which blocks → COMCAST IP PHONE, LLC 318J DENVER CO
2005-04-22 308-770 not yet reported which blocks → N.E. COLORADO CELLULAR, INC. 6874 OSHKOSH NE
2005-04-22 450-207 not yet reported which blocks → Videotron Ltd. 8306 Lachute —
2005-04-22 450-856 not yet reported which blocks → Videotron Ltd. 8306 Brownsburg —
2005-04-22 512-535 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 AUSTIN TX
2005-04-22 605-478 0XXX1XXX7XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HIGHMORE SD
2005-04-22 708-969 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 TINLEYPARK IL
2005-04-22 773-567 0–9 XXXall 10 · 2 holders which blocks → METROPCS, INC. 5562 CHICGOZN03 IL
2005-04-22 902-405 not yet reported which blocks → Bragg Communications Inc. 4878 Halifax —
2005-04-21 202-648 0–9 XXXwhole prefix which blocks → VERIZON WASHINGTON DC, INC. 9211 WSHNGTNZN1 DC
2005-04-21 210-577 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 SANANTONIO TX
2005-04-21 406-697 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 6564 BILLINGS MT
2005-04-21 512-668 0–9 XXXall 10 · 6 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K LOCKHART TX
2005-04-21 512-905 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 AUSTIN TX
2005-04-21 613-686 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Ottawa-Hull —
2005-04-21 618-772 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 COLLINSVL IL
2005-04-21 701-737 7XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WASHBURN ND
2005-04-21 701-920 0XXX1XXX8XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CENTER ND
2005-04-21 701-980 0XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - ND 6568 UNDERWOOD ND

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.