NumberResearch Membership · Data 09/27/2026

Recent prefix assignments

341 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/27/2026

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 26
Rogers Communications Canada Inc. (Wireless) 23
NEW CINGULAR WIRELESS PCS, LLC - IL 22
ONVOY, LLC - CA 21
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
2004-10-19 678-928 0–9 XXXall 10 · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 GAINESVL GA
2004-10-19 706-610 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA 6540 COLUMBUS GA
2004-10-19 706-850 0–9 XXXwhole prefix which blocks → CHARTER IP ENABLED SERVICES, LLC 792K ATHENS GA
2004-10-19 787-606 0–9 XXXall 10 · 5 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 GUAYANILLA PR
2004-10-19 909-714 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FONTANA CA
2004-10-18 248-605 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MI 6120 CLARKSTON MI
2004-10-18 269-308 0–9 XXXall 10 · 6 holders which blocks → COMCAST IP PHONE, LLC 318J HARTFORD MI
2004-10-18 269-815 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MI 6120 BERRIENSPG MI
2004-10-18 269-820 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MI 6120 THREE OAKS MI
2004-10-18 318-504 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - LA 3232 EPPS LA
2004-10-18 318-595 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - LA 3232 DUBACH LA
2004-10-18 336-505 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NC 3235 KIMESVILLE NC
2004-10-18 347-694 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NY 4006 NWYRCYZN06 NY
2004-10-18 352-310 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 OCKLAWAHA FL
2004-10-18 828-414 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NC 3235 BLOWING RK NC
2004-10-18 971-227 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 PORTLAND OR
2004-10-18 989-262 0–9 XXXall 10 · 8 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MI 6120 FRANKENMTH MI
2004-10-18 989-741 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → WINN TELEPHONE COMPANY DBA WINN TELECOM - MI 0127 HARRISON MI
2004-10-15 203-998 0–9 XXXall 10 · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CT 4800 STAMFORD CT
2004-10-15 631-813 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NY 4006 BRENTWOOD NY
2004-10-15 646-290 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NWYRCYZN01 NY
2004-10-15 646-509 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NWYRCYZN01 NY
2004-10-15 646-712 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NWYRCYZN01 NY
2004-10-15 646-873 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NWYRCYZN01 NY
2004-10-15 732-947 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ 6391 METUCHEN NJ
2004-10-15 931-319 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 COOKEVILLE TN
2004-10-15 940-394 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → BRIGHTSPEED OF EASTERN TEXAS, INC. 2084 BRIDGEPORT TX
2004-10-15 979-304 0–9 XXXall 10 · 3 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 GIDDINGS TX
2004-10-14 309-304 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 7 holders which blocks → FRONTIER NORTH, INC. - IL 1015 EUREKA IL
2004-10-14 410-202 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 SALISBURY MD
2004-10-14 575-219 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 CLOVIS NM
2004-10-14 585-489 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2004-10-14 631-873 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 BRENTWOOD NY
2004-10-14 780-206 not yet reported which blocks → TELUS Mobility 8301 Westlock —
2004-10-14 815-390 0–9 XXXall 10 · 8 holders which blocks → COMCAST IP PHONE, LLC 318J BRAIDWOOD IL
2004-10-14 815-414 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 EARLVILLE IL
2004-10-14 819-244 not yet reported which blocks → Bell Mobility 6574 Trois-Rivieres —
2004-10-14 845-702 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 POUGHKEPSI NY
2004-10-14 845-750 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 KINGSTON NY
2004-10-14 905-941 not yet reported which blocks → Bell Mobility 6574 St. Catharines-Thorold —
2004-10-13 215-253 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 PHLDLPHZN1 PA
2004-10-13 224-359 0–9 XXXwhole prefix which blocks → FIRST COMMUNICATIONS, LLC 460K ELGIN IL
2004-10-13 308-225 0–9 XXXall 10 · 5 holders which blocks → N.E. COLORADO CELLULAR, INC. 6874 SCOTSBLUFF NE
2004-10-13 313-466 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN2 MI
2004-10-13 352-289 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 FOREST FL
2004-10-13 403-697 not yet reported which blocks → Bell West Inc. 2933 Calgary —
2004-10-13 403-922 not yet reported which blocks → Bell Mobility 6574 Calgary —
2004-10-13 416-556 not yet reported which blocks → Bell Mobility 6574 Toronto —
2004-10-13 417-973 0XXX1XXX2XXX3XXX4XXX5XXX9XXX · 2 holders which blocks → RYSTEC, INC 142C BRANSON MO
2004-10-13 515-473 0–9 XXXall 10 · 4 holders which blocks → PAETEC ITEL, LLC 829J DES MOINES IA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/27/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.