NumberResearch Membership · Data 09/23/2026

Recent prefix assignments

357 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
NEW CINGULAR WIRELESS PCS, LLC - IL 28
ONVOY, LLC - CA 27
NEW CINGULAR WIRELESS PCS, LLC - DC 27
ONVOY, LLC - NJ 20
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
2011-08-16 201-423 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NJ 6623 JERSEYCITY NJ
2011-08-16 210-306 0–9 XXXall 10 · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SANANTONIO TX
2011-08-16 226-354 not yet reported which blocks → TELUS Integrated Communications 2782 Stratford —
2011-08-16 231-403 0–9 XXXall 10 · 6 holders which blocks → AT&T ENTERPRISES, LLC 516C WILLIAMSBG MI
2011-08-16 234-323 not yet reported which blocks → SUPER-NET, INC. - OH 155F APPLECREEK OH
2011-08-16 321-261 0–9 XXXall 10 · 5 holders which blocks → METROPCS NETWORKS, LLC 899D COCOA FL
2011-08-16 401-318 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - RI 6389 PROVIDENCE RI
2011-08-16 515-505 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 DES MOINES IA
2011-08-16 559-726 0–9 XXXall 10 · 5 holders which blocks → WIDE VOICE, LLC - CA 252F REEDLEY CA
2011-08-16 601-640 0–9 XXXall 10 · 6 holders which blocks → AT&T ENTERPRISES, LLC 516C SEMINARY MS
2011-08-16 603-200 0–9 XXXall 10 · 4 holders which blocks → COMCAST IP PHONE, LLC 318J NEWMARKET NH
2011-08-16 604-259 not yet reported which blocks → Iristel Inc. 154E Vancouver —
2011-08-16 604-260 not yet reported which blocks → Iristel Inc. 154E Vancouver —
2011-08-16 609-316 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS ENTERPRISES, LP 6626 FORT DIX NJ
2011-08-16 701-609 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - ND 6568 WILLISTON ND
2011-08-16 701-818 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - ND 6568 MINOT ND
2011-08-16 760-984 0–9 XXXall 10 · 7 holders which blocks → WIDE VOICE, LLC - CA 252F INDIO CA
2011-08-16 769-222 0–9 XXXall 10 · 6 holders which blocks → AT&T ENTERPRISES, LLC 516C UNION MS
2011-08-16 769-227 0–9 XXXall 10 · 6 holders which blocks → AT&T ENTERPRISES, LLC 516C SILVER CRK MS
2011-08-16 778-200 not yet reported which blocks → Iristel Inc. 154E Vancouver —
2011-08-16 848-230 0–9 XXXall 10 · 6 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NJ 6623 NEWBRNSWCK NJ
2011-08-15 202-735 0–9 XXXall 10 · 6 holders which blocks → METROPCS, INC. 5562 WSHNGTNZN1 DC
2011-08-15 240-438 0–9 XXXall 10 · 5 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSHNGTNZN3 MD
2011-08-15 289-756 not yet reported which blocks → Rogers Communications Canada Inc. (Cable) 743B Binbrook —
2011-08-15 289-757 not yet reported which blocks → Rogers Communications Canada Inc. (Cable) 743B Caledonia —
2011-08-15 289-758 not yet reported which blocks → Rogers Communications Canada Inc. (Cable) 743B Hagersville —
2011-08-15 289-759 not yet reported which blocks → Rogers Communications Canada Inc. (Cable) 743B Mount Hope —
2011-08-15 289-760 not yet reported which blocks → Rogers Communications Canada Inc. (Cable) 743B Stoney Creek —
2011-08-12 248-817 0–9 XXXall 10 · 5 holders which blocks → COMCAST IP PHONE, LLC 318J TROY MI
2011-08-12 385-245 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 KAYSVILLE UT
2011-08-12 410-387 0–9 XXXall 10 · 3 holders which blocks → PAETEC ITEL, LLC 829J BALTIMORE MD
2011-08-12 410-622 0–9 XXXall 10 · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 7228 BALTIMORE MD
2011-08-12 571-359 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 MANASSAS VA
2011-08-12 608-765 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → AT&T ENTERPRISES, LLC 516C RICHMOND WI
2011-08-12 612-244 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 TWINCITIES MN
2011-08-12 706-460 0–9 XXXall 10 · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - GA 7435 LAVONIA GA
2011-08-12 720-606 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 FORTLUPTON CO
2011-08-12 720-708 0–9 XXXall 10 · 3 holders which blocks → TELIAX, INC. - CO 567G DENVER CO
2011-08-12 812-370 0–9 XXXall 10 · 6 holders which blocks → AT&T ENTERPRISES, LLC 516C ST JOSEPH IN
2011-08-12 971-273 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SALEM OR
2011-08-11 224-246 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 NORTHBROOK IL
2011-08-11 224-250 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 DESPLAINES IL
2011-08-11 234-575 0–9 XXXall 10 · 9 holders which blocks → AT&T ENTERPRISES, LLC 516C SALEM OH
2011-08-11 267-454 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 DOYLESTOWN PA
2011-08-11 267-908 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PHLDLPHZN1 PA
2011-08-11 309-429 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 ROCKISLAND IL
2011-08-11 334-350 0–9 XXXall 10 · 3 holders which blocks → POWERTEL BIRMINGHAM LICENSES, INC. 7475 DOTHAN AL
2011-08-11 412-852 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PTTSBGZON1 PA
2011-08-11 443-892 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - MD 071F NEWWINDSOR MD
2011-08-11 470-535 0–9 XXXwhole prefix which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 WINDER GA

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.