NumberResearch Membership · Data 09/25/2026

Recent prefix assignments

358 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/25/2026

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 31
ONVOY, LLC - CA 27
NEW CINGULAR WIRELESS PCS, LLC - IL 27
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
Download CSV ↓
Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2012-12-05 910-553 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K BOLIVIA NC
2012-12-05 910-769 0–9 XXXwhole prefix which blocks → TWC IP ENABLED SERVICES, LLC 793K WILMINGTON NC
2012-12-05 910-939 0–9 XXXall 10 · 5 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K JACKSONVL NC
2012-12-05 980-220 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - NC 998E LATTIMORE NC
2012-12-04 415-696 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2012-12-04 646-655 0–9 XXXwhole prefix which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E NWYRCYZN01 NY
2012-12-04 707-380 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 UKIAH CA
2012-12-04 813-331 0–9 XXXall 10 · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - FL 4802 TAMPASTH FL
2012-12-04 954-256 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - FL 982E FTLAUDERDL FL
2012-12-03 229-573 0–9 XXXall 10 · 4 holders which blocks → AT&T ENTERPRISES, LLC 516C ALBANY GA
2012-12-03 323-486 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 02 CA
2012-12-03 720-386 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - CO 078F GEORGETOWN CO
2012-12-03 813-502 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - FL 982E TAMPAEST FL
2012-12-03 971-317 0–9 XXXall 10 · 6 holders which blocks → COMCAST IP PHONE, LLC 318J BEAVERTON OR
2012-11-30 226-680 not yet reported which blocks → Comwave Networks 160G London —
2012-11-30 318-702 0–9 XXXall 10 · 5 holders which blocks → AT&T ENTERPRISES, LLC 516C COUSHATTA LA
2012-11-30 352-605 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → WINDSTREAM FLORIDA, INC. 0336 ORANGE SPG FL
2012-11-30 404-600 0–9 XXXall 10 · 4 holders which blocks → O1 COMMUNICATIONS EAST, LLC - GA 844G ATLANTA GA
2012-11-30 404-710 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA 6540 ATLANTA GA
2012-11-30 438-258 not yet reported which blocks → Zayo Canada Inc. 8304 Montreal —
2012-11-30 438-588 not yet reported which blocks → TELUS Mobility 8303 Montreal —
2012-11-30 510-454 0–9 XXXall 10 · 4 holders which blocks → PACIFIC BELL 9740 OKLD TRNID CA
2012-11-30 587-759 not yet reported which blocks → TELUS 8084 Edmonton —
2012-11-30 682-217 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 ARLINGTON TX
2012-11-30 786-603 0–9 XXXwhole prefix which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 MIAMI FL
2012-11-30 819-938 not yet reported which blocks → Zayo Canada Inc. 8304 Ottawa-Hull —
2012-11-30 832-812 0–9 XXXwhole prefix which blocks → AERIAL COMMUNICATIONS, INC. 6701 HOUSTON TX
2012-11-30 832-815 0–9 XXXwhole prefix which blocks → AERIAL COMMUNICATIONS, INC. 6701 HOUSTON TX
2012-11-29 415-231 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 SNFC MT-EV CA
2012-11-29 515-518 0–9 XXXall 10 · 4 holders which blocks → QWEST CORPORATION 9631 DES MOINES IA
2012-11-29 587-758 not yet reported which blocks → TELUS 8084 Edmonton —
2012-11-29 616-294 0–9 XXXall 10 · 8 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K HOLLAND MI
2012-11-29 631-601 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BRENTWOOD NY
2012-11-29 907-312 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS 6563 ANCHORAGE AK
2012-11-29 907-419 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS 6563 JUNEAU AK
2012-11-29 907-521 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS 6563 WASILLA AK
2012-11-29 907-987 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS 6563 FAIRBANKS AK
2012-11-29 949-383 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CA 8826 IRVINE CA
2012-11-28 210-702 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 SANANTONIO TX
2012-11-28 614-925 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 GROVEPORT OH
2012-11-28 614-998 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 HILLIARD OH
2012-11-28 778-764 not yet reported which blocks → Iristel Inc. 154E Prince George —
2012-11-28 778-765 not yet reported which blocks → Iristel Inc. 154E South Kamloops —
2012-11-27 216-301 0–9 XXXall 10 · 3 holders which blocks → NUSO, LLC 551G CLEVELAND OH
2012-11-27 234-228 0–9 XXXall 10 · 4 holders which blocks → NUSO, LLC 551G YOUNGSTOWN OH
2012-11-27 234-312 0–9 XXXall 10 · 5 holders which blocks → NUSO, LLC 551G AKRON OH
2012-11-27 331-229 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 NAPERVILLE IL
2012-11-27 440-480 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CHAGRINFLS OH
2012-11-27 443-720 0–9 XXXall 10 · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 ABERDEEN MD
2012-11-27 480-625 0–9 XXXall 10 · 3 holders which blocks → MCC TELEPHONY LLC 593K PHOENIX AZ

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/25/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.