NumberResearch Membership · Data 09/27/2026

Recent prefix assignments

334 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 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
— 616-975 not yet reported which blocks → MICHIGAN BELL TEL CO 9323 GRAND RPDS MI
— 616-976 not yet reported which blocks → MI
— 616-977 not yet reported which blocks → MICHIGAN BELL TEL CO 9323 GRAND RPDS MI
— 616-980 0–9 XXXall 10 · 5 holders which blocks → PAETEC ITEL, LLC 829J GRAND RPDS MI
— 616-984 0XXX1XXX3XXX4XXX7XXX8XXX9XXX · 5 holders which blocks → MICHIGAN BELL TEL CO 9323 TRUFANT MI
— 616-987 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX · 7 holders which blocks → MICHIGAN BELL TEL CO 9323 LOWELL MI
— 616-988 not yet reported which blocks → PAETEC ITEL, LLC 829J GRAND RPDS MI
— 616-990 7XXX8XXX which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 HOLLAND MI
— 616-994 2XXX3XXX8XXX · 2 holders which blocks → MICHIGAN BELL TEL CO 9323 HOLLAND MI
— 616-997 not yet reported which blocks → ACE TEL. CO. OF MICHIGAN, INC. 0669 COOPERSVL MI
— 617-200 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 XXXXXXXXXX MA
— 617-202 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → PAETEC ITEL, LLC 829J BRIGHTON MA
— 617-203 0XXX3XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 EVERETT MA
— 617-204 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 BOSTON MA
— 617-205 not yet reported which blocks → NORFOLK COUNTY INTERNET, INC. 6083 BOSTON MA
— 617-206 0–9 XXXall 10 · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 BRIGHTON MA
— 617-207 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → COMCAST IP PHONE, LLC 318J WINTHROP MA
— 617-208 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 BRIGHTON MA
— 617-209 1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 5 holders which blocks → RCN TELECOM SERVICES, INC. - MA 7619 BELMONT MA
— 617-210 2XXX3XXX · 2 holders which blocks → VERIZON NEW ENGLAND INC. 9102 BOSTON MA
— 617-211 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX MA
— 617-212 none assigned yet which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
— 617-213 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MA 4018 NEWTON MA
— 617-215 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 NEWTON MA
— 617-216 none assigned yet which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 CAMBRIDGE MA
— 617-217 1XXX4XXX8XXX9XXX · 3 holders which blocks → TC SYSTEMS, INC. 7135 BOSTON MA
— 617-218 7XXX which blocks → TC SYSTEMS, INC. 7135 CAMBRIDGE MA
— 617-219 3XXX9XXX which blocks → VERIZON NEW ENGLAND INC. 9102 NEWTON MA
— 617-220 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 XXXXXXXXXX MA
— 617-221 3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → PAETEC ITEL, LLC 829J QUINCY MA
— 617-222 0XXX which blocks → VERIZON NEW ENGLAND INC. 9102 BOSTON MA
— 617-223 1XXX6XXX7XXX · 2 holders which blocks → VERIZON NEW ENGLAND INC. 9102 BOSTON MA
— 617-225 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 CAMBRIDGE MA
— 617-226 7XXX8XXX which blocks → PAETEC ITEL, LLC 829J BOSTON MA
— 617-227 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 BOSTON MA
— 617-228 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 BOSTON MA
— 617-229 5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 CAMBRIDGE MA
— 617-230 not yet reported which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 CAMBRIDGE MA
— 617-231 2XXX3XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MA 4018 WATERTOWN MA
— 617-232 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 BROOKLINE MA
— 617-233 none assigned yet which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 CAMBRIDGE MA
— 617-234 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 CAMBRIDGE MA
— 617-235 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 BOSTON MA
— 617-236 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 BOSTON MA
— 617-237 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 5 holders which blocks → RCN TELECOM SERVICES, INC. - MA 7619 QUINCY MA
— 617-238 3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 ROXBURY MA
— 617-239 1XXX5XXX9XXX · 3 holders which blocks → TC SYSTEMS, INC. 7135 BOSTON MA
— 617-240 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 SAUGUS MA
— 617-241 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 CHARLESTN MA
— 617-242 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 CHARLESTN MA

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.