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
2017-09-18 610-445 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J BELVIDERE PA
2017-09-18 619-349 0–9 XXXall 10 · 4 holders which blocks → COMCAST PHONE OF CALIFORNIA, LLC 394L CHULAVISTA CA
2017-09-15 220-444 0XXX1XXX2XXX4XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - OH 464C MINGO JCT OH
2017-09-15 220-999 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → ONVOY, LLC - OH 464C NEWPORT OH
2017-09-15 240-537 0–9 XXXall 10 · 4 holders which blocks → ATLANTECH ONLINE, INC. - MD 361H HAGERSTOWN MD
2017-09-15 480-702 0–9 XXXall 10 · 3 holders which blocks → COMCAST IP PHONE, LLC 318J PHOENIX AZ
2017-09-15 504-354 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA LA - LLC 653C NEWORLEANS LA
2017-09-15 573-890 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 FULTON MO
2017-09-15 667-227 0–9 XXXall 10 · 5 holders which blocks → ATLANTECH ONLINE, INC. - MD 361H SALISBURY MD
2017-09-15 862-465 0–9 XXXall 10 · 6 holders which blocks → CABLEVISION LIGHTPATH, INC. - NJ 4948 MADISON NJ
2017-09-14 206-742 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 DES MOINES WA
2017-09-14 219-245 0–9 XXXall 10 · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IN 7440 WHEELER IN
2017-09-14 219-500 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - IN 097D MERRILLVL IN
2017-09-14 219-666 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - IN 097D HAMMOND IN
2017-09-14 407-457 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 WINTERPARK FL
2017-09-14 425-447 0–9 XXXwhole prefix which blocks → ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 KIRKLAND WA
2017-09-14 425-544 0–9 XXXwhole prefix which blocks → ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 KIRKLAND WA
2017-09-14 470-799 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - GA 6116 ATLANTA NE GA
2017-09-14 484-867 0–9 XXXall 10 · 7 holders which blocks → OMNIPOINT COMMUNICATIONS ENTERPRISES, LP 6626 EASTON PA
2017-09-14 571-616 0–9 XXXall 10 · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 ENGLESIDE VA
2017-09-14 606-825 0–9 XXXall 10 · 5 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K WILLIAMSBG KY
2017-09-14 747-262 0–9 XXXall 10 · 5 holders which blocks → METROPCS NETWORKS, LLC 899D VAN NUYS CA
2017-09-14 971-294 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 BEAVERTON OR
2017-09-13 201-732 0–9 XXXall 10 · 2 holders which blocks → CABLEVISION LIGHTPATH, INC. - NJ 4948 HACKENSACK NJ
2017-09-13 431-295 not yet reported which blocks → Bell Mobility 6574 Virden —
2017-09-13 437-377 not yet reported which blocks → IXICA Communications Inc. 812H Toronto —
2017-09-13 470-687 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 ATLANTA NE GA
2017-09-13 602-699 0–9 XXXall 10 · 2 holders which blocks → METROPCS, INC. 5562 PHOENIX AZ
2017-09-13 726-666 0–9 XXXall 10 · 4 holders which blocks → EVOLVE CELLULAR, INC. 139F SANANTONIO TX
2017-09-13 747-259 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 CANOGAPARK CA
2017-09-13 774-355 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → COMCAST IP PHONE, LLC 318J BUZZARDSBY MA
2017-09-13 812-943 0XXX1XXX2XXX3XXX4XXX5XXX6XXX · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - IN 7314 CRANE IN
2017-09-13 908-348 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ELIZABETH NJ
2017-09-13 949-316 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 IRVINE CA
2017-09-13 984-285 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - NC 8389 BENSON NC
2017-09-12 407-407 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - FL 8300 ORLANDO FL
2017-09-12 412-785 0–9 XXXall 10 · 5 holders which blocks → VONAGE AMERICA LLC 197D PTTSBGZON1 PA
2017-09-12 469-325 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 MCKINNEY TX
2017-09-12 469-428 0–9 XXXall 10 · 4 holders which blocks → SOUTHWESTERN BELL 9533 FRISCO TX
2017-09-12 470-475 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 ATLANTA NE GA
2017-09-12 520-666 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - AZ 630E CASAGRANDE AZ
2017-09-12 587-429 not yet reported which blocks → Videotron Ltd. 787G Calgary —
2017-09-12 587-566 not yet reported which blocks → Videotron Ltd. 787G Edmonton —
2017-09-12 650-379 0–9 XXXall 10 · 7 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 SSNFRNCSCO CA
2017-09-12 702-344 0–9 XXXall 10 · 3 holders which blocks → CASCADE ACCESS, LLC - NV 100J MESQUITE NV
2017-09-12 774-366 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - MA 892D WORCESTER MA
2017-09-12 778-917 not yet reported which blocks → Videotron Ltd. 787G Vancouver —
2017-09-12 971-377 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - OR 750E CLACKAMAS OR
2017-09-11 202-845 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 WSHNGTNZN1 DC
2017-09-11 463-222 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - IN 097D FRANKLIN IN

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.