NumberResearch Membership · Data 09/30/2026

Recent prefix assignments

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

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
Rogers Communications Canada Inc. (Wireless) 46
8X8, INC. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 28
NEW CINGULAR WIRELESS PCS, LLC - IL 23
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
2017-09-22 857-298 0–9 XXXall 10 · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H CAMBRIDGE MA
2017-09-21 260-250 0–9 XXXall 10 · 3 holders which blocks → MCC TELEPHONY OF THE MID-WEST, LLC - IN 874F MONROEVL IN
2017-09-21 309-271 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC 224C PEORIA IL
2017-09-21 331-244 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC 224C NAPERVILLE IL
2017-09-21 438-505 not yet reported which blocks → Videotron Ltd. 328F Montreal —
2017-09-21 438-522 not yet reported which blocks → Videotron Ltd. 328F Montreal —
2017-09-21 475-338 0–9 XXXall 10 · 4 holders which blocks → COMCAST IP PHONE, LLC 318J BRANFORD CT
2017-09-21 757-960 0–9 XXXall 10 · 5 holders which blocks → COMCAST IP PHONE, LLC 318J SMITHFIELD VA
2017-09-21 862-306 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 PASSAIC NJ
2017-09-21 914-247 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → METROPCS, INC. 5562 MT VERNON NY
2017-09-20 346-272 0–9 XXXall 10 · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7138 HOUSTON TX
2017-09-20 346-273 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 TOMBALL TX
2017-09-20 442-270 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 EL CENTRO CA
2017-09-20 516-401 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 NASSAUZN02 NY
2017-09-20 628-240 0–9 XXXall 10 · 8 holders which blocks → METROPCS, INC. 5562 SAN RAFAEL CA
2017-09-20 647-901 not yet reported which blocks → Videotron Ltd. 787G Toronto —
2017-09-20 647-904 not yet reported which blocks → Videotron Ltd. 787G Toronto —
2017-09-20 647-906 not yet reported which blocks → Videotron Ltd. 787G Toronto —
2017-09-20 707-209 0–9 XXXall 10 · 6 holders which blocks → METROPCS, INC. 5562 VALLEJO CA
2017-09-20 737-228 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 AUSTIN TX
2017-09-20 786-492 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 KEYS FL
2017-09-20 859-551 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 TELECOM OF KENTUCKY, LLC - KY 7260 LEXINGTON KY
2017-09-19 343-249 not yet reported which blocks → TELUS Integrated Communications 2782 Athens —
2017-09-19 343-250 not yet reported which blocks → TELUS Integrated Communications 2782 Cardinal —
2017-09-19 343-251 not yet reported which blocks → TELUS Integrated Communications 2782 Delta —
2017-09-19 365-208 not yet reported which blocks → TELUS Integrated Communications 2782 Cayuga —
2017-09-19 365-209 not yet reported which blocks → TELUS Integrated Communications 2782 Dunnville —
2017-09-19 463-206 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 INDIANAPLS IN
2017-09-19 518-716 7XXX8XXX · 2 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J CANAJOHARI NY
2017-09-19 548-220 not yet reported which blocks → TELUS Integrated Communications 2782 Harriston —
2017-09-19 548-221 not yet reported which blocks → TELUS Integrated Communications 2782 Mitchell —
2017-09-19 548-222 not yet reported which blocks → TELUS Integrated Communications 2782 Palmerston —
2017-09-19 548-223 not yet reported which blocks → TELUS Integrated Communications 2782 Tavistock —
2017-09-19 618-312 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → WABASH INDEPENDENT NETWORKS, INC DBA WABASH COMM 772H SALEM IL
2017-09-19 737-227 0–9 XXXall 10 · 7 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J WIMBERLEY TX
2017-09-19 810-322 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LAPEER MI
2017-09-19 949-317 0–9 XXXall 10 · 6 holders which blocks → COMCAST PHONE OF CALIFORNIA, LLC 394L SADLBK VLY CA
2017-09-18 239-203 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 FTMYERSBCH FL
2017-09-18 343-241 not yet reported which blocks → TELUS Integrated Communications 2782 Barry's Bay —
2017-09-18 343-242 not yet reported which blocks → TELUS Integrated Communications 2782 Calabogie —
2017-09-18 343-243 not yet reported which blocks → TELUS Integrated Communications 2782 Cobden —
2017-09-18 343-245 not yet reported which blocks → TELUS Integrated Communications 2782 Deep River —
2017-09-18 343-246 not yet reported which blocks → TELUS Integrated Communications 2782 Eganville —
2017-09-18 343-247 not yet reported which blocks → TELUS Integrated Communications 2782 Killaloe —
2017-09-18 343-248 not yet reported which blocks → TELUS Integrated Communications 2782 Whitney —
2017-09-18 361-223 0–9 XXXall 10 · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 BENAVIDES TX
2017-09-18 484-677 0XXX1XXX2XXX3XXX4XXX6XXX7XXX · 7 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J BANGOR PA
2017-09-18 484-912 0XXX1XXX5XXX7XXX · 4 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J PEN ARGYL PA
2017-09-18 571-362 0–9 XXXwhole prefix which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 HERNDON VA
2017-09-18 602-598 0–9 XXXall 10 · 5 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J PHOENIX AZ

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/30/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.