Subsidiary

Jurisdiction of
Incorporation/
Organization

D/B/A

tw telecom holdings inc.

tw telecom holdings II llc

tw telecom l.p.

tw telecom management co. llc

tw telecom data services llc

tw telecom of alabama llc

tw telecom of arizona llc

tw telecom of arkansas llc

tw telecom of colorado llc

tw telecom of d.c. llc

tw telecom of idaho llc

tw telecom of illinois llc

tw telecom of louisiana llc

tw telecom of kansas city llc

tw telecom of kentucky llc

tw telecom of louisiana llc

tw telecom of maryland llc

tw telecom of minnesota llc

tw telecom of mississippi llc

tw telecom of nevada llc

tw telecom of new mexico llc

tw telecom of ohio llc

tw telecom of oklahoma llc

tw telecom of oregon llc

tw telecom of south carolina llc

tw telecom of tennessee llc

tw telecom of texas llc

tw telecom of utah llc

tw telecom of virginia llc

tw telecom of washington llc

tw telecom of california l.p.

tw telecom of florida l.p.

tw telecom of georgia l.p.

tw telecom of hawaii l.p.

tw telecom of indiana l.p.

tw telecom of new jersey l.p.

tw telecom of new york l.p.

tw telecom of north carolina l.p.

tw telecom of wisconsin l.p.

Xspedius Management Co. International, LLC