NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

355 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026

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. 38
ONVOY, LLC - CA 31
NEW CINGULAR WIRELESS PCS, LLC - IL 28
NEW CINGULAR WIRELESS PCS, LLC - DC 26
ONVOY, LLC - NJ 18
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
2010-06-11 202-697 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - DC 6402 WSHNGTNZN1 DC
2010-06-11 219-296 1XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WHEATFIELD IN
2010-06-11 226-377 not yet reported which blocks → Bell Mobility 6574 London —
2010-06-11 289-795 not yet reported which blocks → Bell Mobility 6574 Oakville —
2010-06-11 317-447 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 6725 INDIANAPLS IN
2010-06-11 603-360 1XXX which blocks → TOPSHAM COMMUNICATIONS, LLC 573F ORFORD NH
2010-06-11 613-403 not yet reported which blocks → Bell Mobility 6574 Belleville —
2010-06-11 615-678 0–9 XXXall 10 · 3 holders which blocks → COMCAST IP PHONE, LLC 318J NASHVILLE TN
2010-06-11 760-659 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E VISTA CA
2010-06-11 760-678 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E BARSTOW CA
2010-06-11 818-514 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E RESEDA CA
2010-06-11 819-857 not yet reported which blocks → TELUS Quebec 2243 Drummondville —
2010-06-11 865-309 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 KNOXVILLE TN
2010-06-11 909-279 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E FONTANA CA
2010-06-11 909-280 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E HIGHLAND CA
2010-06-11 931-240 0–9 XXXall 10 · 5 holders which blocks → MCC TELEPHONY LLC 593K FAYETTEVL TN
2010-06-10 260-277 0–9 XXXall 10 · 6 holders which blocks → MCC TELEPHONY OF THE MID-WEST, LLC - IN 874F HARLAN IN
2010-06-10 260-286 0–9 XXXall 10 · 5 holders which blocks → MCC TELEPHONY OF THE MID-WEST, LLC - IN 874F CHURUBUSCO IN
2010-06-10 260-297 0–9 XXXall 10 · 6 holders which blocks → MCC TELEPHONY OF THE MID-WEST, LLC - IN 874F OSSIAN IN
2010-06-10 571-659 0–9 XXXall 10 · 5 holders which blocks → COMCAST IP PHONE, LLC 318J DALE CITY VA
2010-06-10 604-354 not yet reported which blocks → Bell Mobility 6574 Vancouver —
2010-06-10 609-549 0–9 XXXall 10 · 7 holders which blocks → COMCAST IP PHONE, LLC 318J BARNEGAT NJ
2010-06-10 616-325 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 GRAND RPDS MI
2010-06-10 740-692 0–9 XXXall 10 · 8 holders which blocks → GOLDSTAR COMMUNICATIONS, LLC - OH 9133 MARION OH
2010-06-10 802-331 0–9 XXXall 10 · 4 holders which blocks → TOPSHAM COMMUNICATIONS, LLC 573F FAIRLEE VT
2010-06-10 802-624 0–9 XXXall 10 · 7 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VT 6390 NEWPORT VT
2010-06-10 819-968 not yet reported which blocks → Videotron Ltd. 328F Ottawa-Hull —
2010-06-10 857-266 0–9 XXXwhole prefix which blocks → METROPCS, INC. 5562 BOSTON MA
2010-06-10 902-325 not yet reported which blocks → Bell Mobility Aliant 329A Upper Musquodoboit —
2010-06-09 408-724 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNJS SOUTH CA
2010-06-09 423-486 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 CHATTNOOGA TN
2010-06-09 443-377 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 TOWSON MD
2010-06-09 443-754 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 SALISBURY MD
2010-06-09 615-200 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - TN 124F NASHVILLE TN
2010-06-09 865-321 0–9 XXXall 10 · 4 holders which blocks → POWERTEL NASHVILLE LICENSES, INC. 7476 KNOXVILLE TN
2010-06-09 901-736 0–9 XXXall 10 · 2 holders which blocks → METROPCS, INC. 5562 MEMPHIS TN
2010-06-09 951-292 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E HEMT SNJC CA
2010-06-09 951-293 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E PERRIS CA
2010-06-08 205-767 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AL 6804 BIRMINGHAM AL
2010-06-08 256-924 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AL 6804 HUNTSVILLE AL
2010-06-08 321-418 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 ORLANDO FL
2010-06-08 352-519 0–9 XXXall 10 · 5 holders which blocks → POWERTEL JACKSONVILLE LICENSES, INC. 7472 GAINESVL FL
2010-06-08 386-275 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 DAYTONABCH FL
2010-06-08 404-991 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA 6540 ATLANTA GA
2010-06-08 443-750 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 BALTIMORE MD
2010-06-08 513-446 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2010-06-08 581-306 not yet reported which blocks → Bell Mobility 6574 Chicoutimi —
2010-06-08 581-307 not yet reported which blocks → Bell Mobility 6574 Quebec —
2010-06-08 587-433 not yet reported which blocks → Bell Mobility 6574 Calgary —
2010-06-08 587-700 not yet reported which blocks → Videotron Ltd. 383F Calgary —

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.