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
2011-12-27 606-660 0XXX1XXX2XXX3XXX4XXX5XXX6XXX · 3 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K BRODHEAD KY
2011-12-27 606-699 0XXX1XXX2XXX3XXX4XXX8XXX9XXX · 4 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K FLAT LICK KY
2011-12-27 606-707 0–9 XXXall 10 · 6 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K ONEIDA KY
2011-12-27 606-708 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K NANCY KY
2011-12-27 606-806 0XXX1XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K SHOPVILLE KY
2011-12-27 606-960 0XXX1XXX2XXX4XXX6XXX7XXX8XXX · 5 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K WHITE LILY KY
2011-12-27 760-463 0–9 XXXall 10 · 8 holders which blocks → MCC TELEPHONY OF THE WEST, LLC - CA 857F RIDGECREST CA
2011-12-27 917-722 0–9 XXXall 10 · 5 holders which blocks → PEERLESS NETWORK OF NEW YORK, LLC - NY 155E NWYRCYZN14 NY
2011-12-27 918-802 not yet reported which blocks → BTC BROADBAND, INC. 669B RAMONA OK
2011-12-23 209-317 0–9 XXXall 10 · 5 holders which blocks → AT&T ENTERPRISES, LLC 516C COULTERVL CA
2011-12-23 215-251 0–9 XXXall 10 · 2 holders which blocks → METROPCS, INC. 5562 PHLDLPHZN1 PA
2011-12-23 215-678 0–9 XXXall 10 · 2 holders which blocks → METROPCS, INC. 5562 PHLDLPHZN1 PA
2011-12-23 323-358 0–9 XXXall 10 · 3 holders which blocks → METROPCS NETWORKS, LLC 899D MONTEBELLO CA
2011-12-23 770-545 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA 6540 ATLANTA NE GA
2011-12-23 770-549 0–9 XXXall 10 · 2 holders which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 ATLANTA NE GA
2011-12-23 770-743 0–9 XXXall 10 · 4 holders which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 ATLANTA NE GA
2011-12-23 929-221 0–9 XXXwhole prefix which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 NWYRCYZN06 NY
2011-12-22 204-809 not yet reported which blocks → Iristel Inc. 154E Winnipeg —
2011-12-22 262-425 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → AT&T ENTERPRISES, LLC 516C SOMERS WI
2011-12-22 289-816 not yet reported which blocks → Iristel Inc. 154E Burlington —
2011-12-22 314-281 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LADUE MO
2011-12-22 314-287 0–9 XXXall 10 · 6 holders which blocks → AT&T ENTERPRISES, LLC 516C KIRKWOOD MO
2011-12-22 318-575 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 MANSFIELD LA
2011-12-22 506-803 not yet reported which blocks → Iristel Inc. 154E Moncton —
2011-12-22 604-256 not yet reported which blocks → Iristel Inc. 154E New Westminster —
2011-12-22 778-812 not yet reported which blocks → ISP Telecom Inc. 4727 Vancouver —
2011-12-22 778-813 not yet reported which blocks → ISP Telecom Inc. 4727 Vancouver —
2011-12-22 902-290 not yet reported which blocks → Bragg Communications Inc. 421G Alberton —
2011-12-22 902-330 not yet reported which blocks → Bragg Communications Inc. 421G Charlottetown —
2011-12-22 902-372 not yet reported which blocks → Bragg Communications Inc. 421G Souris —
2011-12-22 902-380 not yet reported which blocks → Bragg Communications Inc. 421G Montague —
2011-12-22 902-786 not yet reported which blocks → Bragg Communications Inc. 421G Summerside —
2011-12-22 971-282 0–9 XXXall 10 · 5 holders which blocks → QWEST CORPORATION 9638 PORTLAND OR
2011-12-21 289-779 not yet reported which blocks → Iristel Inc. 154E Hamilton —
2011-12-21 309-425 0–9 XXXall 10 · 8 holders which blocks → AT&T ENTERPRISES, LLC 516C FIATT IL
2011-12-21 450-912 not yet reported which blocks → Iristel Inc. 154E Longueuil —
2011-12-21 513-510 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 CINCINNATI OH
2011-12-21 513-580 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 CINCINNATI OH
2011-12-21 604-900 not yet reported which blocks → Iristel Inc. 154E Vancouver —
2011-12-21 604-901 not yet reported which blocks → Iristel Inc. 154E Vancouver —
2011-12-21 864-301 0–9 XXXall 10 · 6 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL 9417 UNION SC
2011-12-21 902-702 not yet reported which blocks → Iristel Inc. 154E Halifax —
2011-12-20 215-278 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - PA 547E PHLDLPHZN1 PA
2011-12-20 343-333 not yet reported which blocks → Videotron Ltd. 383F Kingston —
2011-12-20 409-202 0–9 XXXall 10 · 6 holders which blocks → AT&T ENTERPRISES, LLC 516C JASPER TX
2011-12-20 512-201 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 AUSTIN TX
2011-12-20 530-433 0–9 XXXall 10 · 5 holders which blocks → U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J CHICO CA
2011-12-20 540-217 0–9 XXXall 10 · 6 holders which blocks → COMCAST IP PHONE, LLC 318J HARRISONBG VA
2011-12-20 540-225 0–9 XXXall 10 · 9 holders which blocks → COMCAST IP PHONE, LLC 318J STANLEY VA
2011-12-20 587-295 not yet reported which blocks → TELUS 8084 Calgary —

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.