NumberResearch Membership · Data 09/30/2026

Recent prefix assignments

372 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 27
NEW CINGULAR WIRELESS PCS, LLC - IL 23
ONVOY, LLC - CA 19
New assignments by month Oct 2026 Sep 2026 Aug 2026 Jul 2026 Jun 2026 May 2026 Apr 2026 Mar 2026 Feb 2026 Jan 2026 Dec 2025 Nov 2025
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Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2018-06-22 385-270 0–9 XXXall 10 · 4 holders which blocks → ADVANCED TELECOM SOLUTIONS, LLC 181J SALT LAKE UT
2018-06-22 769-219 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 TOOMSUBA MS
2018-06-22 808-940 0–9 XXXall 10 · 2 holders which blocks → VONAGE AMERICA LLC 197D HONOLULU HI
2018-06-22 873-740 not yet reported which blocks → Iristel Inc. 154E Buckingham —
2018-06-22 920-401 0–9 XXXall 10 · 5 holders which blocks → INTEGRATED PATH COMMUNICATIONS, LLC - WI 766H GREEN BAY WI
2018-06-22 971-326 0–9 XXXall 10 · 7 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 SEASIDE OR
2018-06-21 343-945 not yet reported which blocks → Iristel Inc. 154E Bancroft —
2018-06-21 437-536 not yet reported which blocks → Iristel Inc. 154E Toronto —
2018-06-21 437-539 not yet reported which blocks → Iristel Inc. 154E Toronto —
2018-06-21 438-604 not yet reported which blocks → Iristel Inc. 154E Montreal —
2018-06-21 445-544 0–9 XXXall 10 · 5 holders which blocks → ONVOY SPECTRUM, LLC 624H PHLDLPHZN1 PA
2018-06-21 540-646 0XXX1XXX8XXX9XXX · 2 holders which blocks → VONAGE AMERICA LLC 197D HARRISONBG VA
2018-06-21 540-870 0–9 XXXall 10 · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H FREDECKSBG VA
2018-06-21 541-642 not yet reported which blocks → ALYRICA TELEPHONE LLC DBA NEXT GEN PHONE SYS-OR 9882 HALSEY OR
2018-06-21 562-380 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E LONG BEACH CA
2018-06-21 605-961 0–9 XXXall 10 · 5 holders which blocks → VONAGE AMERICA LLC 197D SIOUX FLS SD
2018-06-21 641-575 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - IA 985E OTTUMWA IA
2018-06-21 737-236 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F AUSTIN TX
2018-06-21 737-238 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F BERTRAM TX
2018-06-21 782-830 not yet reported which blocks → Iristel Inc. 154E Halifax —
2018-06-21 902-601 not yet reported which blocks → Iristel Inc. 154E New Glasgow —
2018-06-21 918-792 2XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - OK 5257 RED OAK OK
2018-06-20 223-203 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - PA 002F AIRVILLE PA
2018-06-20 223-322 0–9 XXXall 10 · 4 holders which blocks → ONVOY SPECTRUM, LLC 624H HARISBGZN1 PA
2018-06-20 272-270 0–9 XXXall 10 · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H BLOOMSBURG PA
2018-06-20 385-501 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - UT 117F SALT LAKE UT
2018-06-20 412-550 0–9 XXXall 10 · 5 holders which blocks → ONVOY SPECTRUM, LLC 624H PTTSBGZON1 PA
2018-06-20 434-435 0–9 XXXall 10 · 5 holders which blocks → ONVOY SPECTRUM, LLC 624H LYNCHBURG VA
2018-06-20 470-405 0–9 XXXwhole prefix which blocks → BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL 9417 ATLANTA NW GA
2018-06-20 515-654 0XXX1XXX3XXX4XXX5XXX6XXX9XXX · 5 holders which blocks → METROPCS, INC. 5562 WEBSTER CY IA
2018-06-20 540-541 0–9 XXXall 10 · 4 holders which blocks → ONVOY SPECTRUM, LLC 624H ROANOKE VA
2018-06-20 616-655 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GRAND RPDS MI
2018-06-20 641-354 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 8 holders which blocks → METROPCS, INC. 5562 MARSHALLTN IA
2018-06-20 641-630 0–9 XXXall 10 · 7 holders which blocks → METROPCS, INC. 5562 HAMPTON IA
2018-06-20 757-704 0–9 XXXall 10 · 5 holders which blocks → ONVOY SPECTRUM, LLC 624H NRFOLKZON1 VA
2018-06-20 814-770 2XXX3XXX4XXX5XXX6XXX7XXX · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H ALTOONA PA
2018-06-19 201-201 0–9 XXXall 10 · 4 holders which blocks → ONVOY SPECTRUM, LLC 624H JERSEYCITY NJ
2018-06-19 202-890 0–9 XXXall 10 · 4 holders which blocks → ONVOY SPECTRUM, LLC 624H WSHNGTNZN1 DC
2018-06-19 225-418 0–9 XXXall 10 · 3 holders which blocks → VOICESTREAM GSM I, LLC 150C BATONROUGE LA
2018-06-19 240-840 0–9 XXXall 10 · 5 holders which blocks → ONVOY SPECTRUM, LLC 624H FREDERICK MD
2018-06-19 431-532 not yet reported which blocks → Iristel Inc. 154E Starbuck —
2018-06-19 506-719 not yet reported which blocks → Iristel Inc. 154E Saint John —
2018-06-19 609-908 0–9 XXXall 10 · 4 holders which blocks → ONVOY SPECTRUM, LLC 624H ATLNTIC CY NJ
2018-06-19 629-223 0–9 XXXall 10 · 3 holders which blocks → PAETEC ITEL, LLC 829J FRANKLIN TN
2018-06-19 667-250 0–9 XXXall 10 · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H BALTIMORE MD
2018-06-19 667-252 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H SALISBURY MD
2018-06-19 825-801 not yet reported which blocks → Iristel Inc. 154E Calgary —
2018-06-19 856-850 0–9 XXXall 10 · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H CAMDEN NJ
2018-06-19 971-323 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - OR 076F PORTLAND OR
2018-06-18 236-358 not yet reported which blocks → Iristel Inc. 154E Fort St. John —

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.