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WHOIS

Lookup an IP or domain. Uses IANA referral first, then registry WHOIS.

Query
122.100.139.238
IANA
whois.iana.org
Referred
whois.apnic.net
WHOIS servers can rate limit. Results are cached for performance.
### IANA response (whois.iana.org)

% IANA WHOIS server
% for more information on IANA, visit http://www.iana.org
% This query returned 1 object

refer:        whois.apnic.net

inetnum:      122.0.0.0 - 122.255.255.255
organisation: APNIC
status:       ALLOCATED

whois:        whois.apnic.net

changed:      2006-01
source:       IANA

### Registry response (whois.apnic.net)

% [whois.apnic.net]
% Whois data copyright terms    http://www.apnic.net/db/dbcopyright.html

% Information related to '122.100.128.0 - 122.100.255.255'

% Abuse contact for '122.100.128.0 - 122.100.255.255' is 'NMC_Internet_LeasedLine@ctm.com.mo'

inetnum:        122.100.128.0 - 122.100.255.255
netname:        CTM-MO
descr:          CTM
country:        MO
org:            ORG-CDTD1-AP
admin-c:        CN448-AP
tech-c:         CM2469-AP
abuse-c:        AC2161-AP
status:         ALLOCATED PORTABLE
remarks:        -+-+-+-+-+-+-+-+-+-+-+-++-+-+-+-+-+-+-+-+-+-+-+-+-+-+
remarks:        This object can only be updated by APNIC hostmasters.
remarks:        To update this object, please contact APNIC
remarks:        hostmasters and include your organisation's account
remarks:        name in the subject line.
remarks:        -+-+-+-+-+-+-+-+-+-+-+-++-+-+-+-+-+-+-+-+-+-+-+-+-+-+
mnt-by:         APNIC-HM
mnt-lower:      MAINT-CTM-MO
mnt-routes:     MAINT-CTM-MO
mnt-irt:        IRT-CTM-MO
last-modified:  2021-01-18T03:52:14Z
source:         APNIC

irt:            IRT-CTM-MO
address:        Rua da Lagos, Telecentro
address:        P.O. Box 868
address:        Taipa
address:        Macau
e-mail:         NMC_Internet_LeasedLine@ctm.com.mo
abuse-mailbox:  NMC_Internet_LeasedLine@ctm.com.mo
admin-c:        CN448-AP
tech-c:         CM2469-AP
auth:           # Filtered
remarks:        nmc_internet_leasedline@ctm.com.mo is invalid
mnt-by:         MAINT-CTM-MO
last-modified:  2025-11-18T00:26:29Z
source:         APNIC

organisation:   ORG-CDTD1-AP
org-name:       Companhia de Telecomunicacoes de Macau
org-type:       LIR
country:        MO
address:        Rua de Lagos
address:        Telecentro
address:        Taipa
address:        Macau
phone:          +853-891-2211
fax-no:         +853-891-2933
e-mail:         NMC_Internet_LeasedLine@ctm.com.mo
mnt-ref:        APNIC-HM
mnt-by:         APNIC-HM
last-modified:  2023-09-05T02:14:42Z
source:         APNIC

role:           ABUSE CTMMO
country:        ZZ
address:        Rua da Lagos, Telecentro
address:        P.O. Box 868
address:        Taipa
address:        Macau
phone:          +000000000
e-mail:         NMC_Internet_LeasedLine@ctm.com.mo
admin-c:        CN448-AP
tech-c:         CM2469-AP
nic-hdl:        AC2161-AP
remarks:        Generated from irt object IRT-CTM-MO
remarks:        nmc_internet_leasedline@ctm.com.mo is invalid
abuse-mailbox:  NMC_Internet_LeasedLine@ctm.com.mo
mnt-by:         APNIC-ABUSE
last-modified:  2025-07-16T13:12:03Z
source:         APNIC

person:         CTM Mcenter
address:        Rua de Lagos, Telecentro, Taipa
country:        MO
phone:          +853 8891 2211
e-mail:         NMC_Internet_LeasedLine@ctm.com.mo
nic-hdl:        CM2469-AP
mnt-by:         MAINT-CTM-MO
last-modified:  2022-06-27T02:35:35Z
source:         APNIC

person:         CTM NOC
address:        Rua de Lagos, Telecentro, Taipa
country:        MO
phone:          +853 8891 2211
e-mail:         NMC_Internet_LeasedLine@ctm.com.mo
nic-hdl:        CN448-AP
mnt-by:         MAINT-CTM-MO
last-modified:  2022-06-27T02:30:59Z
source:         APNIC

% Information related to '122.100.139.0/24AS4609'

route:          122.100.139.0/24
origin:         AS4609
descr:          Companhia de Telecomunicacoes de Macau
                Rua de Lagos
                Telecentro
                Taipa
                Macau
mnt-by:         MAINT-CTM-MO
last-modified:  2023-08-28T02:05:35Z
source:         APNIC

% This query was served by the APNIC Whois Service version 1.88.34 (WHOIS-UK2)

Frequently Asked Questions

What is WHOIS?

WHOIS is a protocol that queries databases to find the registered owner of a domain name or IP address. It reveals the registrar, registration dates, nameservers, and contact information associated with a domain or IP block.

Is WHOIS data always accurate?

Not always. Many domain registrars offer WHOIS privacy protection that replaces the registrant's personal details with proxy information. IP WHOIS data from Regional Internet Registries (RIRs) is generally more reliable than domain WHOIS data.

Can I use WHOIS to find who owns an IP address?

Yes. Enter any IP address into the WHOIS tool to find the organization that owns the IP block, the Regional Internet Registry (ARIN, RIPE, APNIC, etc.) that allocated it, and the network range it belongs to.

What is the difference between domain WHOIS and IP WHOIS?

Domain WHOIS shows registration details like the registrar, creation date, expiry date, and nameservers. IP WHOIS shows the network allocation, the organization that owns the IP block, and the abuse contact for reporting issues.

Why does WHOIS show privacy protection instead of real details?

Domain registrars offer WHOIS privacy services to protect registrants from spam, identity theft, and unwanted contact. GDPR regulations in Europe also require redaction of personal data from WHOIS records.

How often is WHOIS data updated?

WHOIS data is updated by the registrar or registry whenever changes are made to a domain or IP registration. Our tool queries the authoritative WHOIS server in real-time, with results cached for 7 days to reduce server load.

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