NPA
NXX
CLLI
City, ST
Telco
410
335
CHASMDCHDS0
CHASE
VERIZON MARYLAND INC.
410
344
CHASMDCHDS0
CHASE
VERIZON MARYLAND INC.
410
630
BLTMMDDNDS0
CHASE
MCIMETRO ATS INC.
443
228
CLMAMDJTDS0
CHASE
US LEC OF MARYLAND INC.
443
317
BLTOMDXIDS0
CHASE
GLOBAL CROSSING LOCAL SERVICES INC.-MD
443
489
BLTMMDFMDS0
CHASE
TELEPORT COMMUNICATIONS GROUP AMERICA INC. - MD
443
554
BLTMMDCHXWY
CHASE
OMNIPOINT COMMUNICATIONS CAP OPERATIONS LLC
443
581
BLTMMDDN4MD
CHASE
GLOBAL NAPS SOUTH INC. - MD
443
626
BLTMMDSNDS0
CHASE
CAVALIER EAST LLC - MD
443
873
LARLMDCC1MD
CHASE
XSPEDIUS MANAGEMENT CO SWITCHES SERVICES LLC - MD
620
938
CHASKSWERS0
CHASE
SOUTHWESTERN BELL