Here is a list of IDN registrars from Verisign - for .com and .net:
IDN Registrars have completed an accreditation program based on guidelines set by ICANN. Once accredited by ICANN, these registrars go through very thorough testing to be prepared to offer domain name registration services. The following registrars have completed the accreditation progress and testing and are currently operational. They provide IDN registration services for .com and .net. extensions.
000Domains.com US
007Names, Inc. US
123 Registration, Inc. US
1st Domain.net, division of G+D International, LLC US
A
Active ISP ASA Norway
Alldomains.com, Inc. US
Arsys Spain
Ascio Technologies, Inc. Denmark
B
BB Online UK Ltd. UK
BulkRegister, LLC. US
C
Catalog.com, Inc. US
China-channel.com China
CommuniGal Communications, Ltd. Israel
CORE - Internet Council of Registrars Switzerland
Cronon AG Germany
CyDentity, Inc. Korea
D
Domain Bank, Inc. US
Domain Registration Services, Inc. US
DomainCA.com Korea
domaindiscount24.com Germany
domaininfo.com Sweden
doregi.com Korea
Dotster, Inc. US
Dynadot, LLC US
E
eNom, Inc. US
F
Firstserver, Inc. Japan
Future Media Network K.K. Japan
G
Gabia, Inc. Korea
Gandi France
GKG.net, Inc US
Global Media Online, Inc. Japan
Globedom Datenkommunikations GmbH d/b/a Globedom Austria
H
HiChina Web Solutions (Hong Kong) Limited China
I
INAMES Corp. Korea
Interdomain, SA Spain
ItsYourDomain.com US
J
joker.com Germany
M
Melbourne IT Limited Australia
N
Name.com LLC US
Namebay SAM Monaco
Names4Ever US
namesbeyond.com Canada
NetBenefit PLC d/b/a NetNames UK
Netpia.com, Inc. Korea
Nomer.com Brazil
Nominalia Internet S.L. Spain
P
pAsia, Inc. China
PSI-Japan, Inc. Japan
PSI-USA, Inc. US
R
register.com, Inc. US
rgnames.com Korea
S
SafeNames, Ltd. UK
Schlund+Partner AG Germany
Spot Domain LLC d/b/a Domainsite.com US
T
Today and Tomorrow Co. Ltd. Korea
TUCOWS Inc. Canada
W
WebNic.cc UK
X
Xin Net Corp. China
Y
YesNIC Co Ltd.
http://www.verisign.com/information-...ge_001397.html