123.136.64.0/24

AS23767 · A-STAR

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Summary

Country	Singapore
Domain	a-star.edu.sg
ASN	AS23767
Registry	APNIC
ID	A-STAR-SG

WHOIS Details

inetnum:        123.136.64.0 - 123.136.64.255
netname:        A-STAR-SG
descr:          Agency for Science, Technology and Research
country:        SG
admin-c:        IN139-AP
tech-c:         IN139-AP
abuse-c:        AA1894-AP
status:         ALLOCATED NON-PORTABLE
mnt-by:         MAINT-A-STAR-SG
mnt-irt:        IRT-A-STAR-SG
last-modified:  2022-05-12T01:55:16Z
source:         APNIC

irt:            IRT-A-STAR-SG
address:        Agency for Science, Technology and Research
address:        
address:        
address:        
e-mail:         ITSS_Network@hq.a-star.edu.sg
abuse-mailbox:  ITSS_Network@hq.a-star.edu.sg
admin-c:        SM2111-AP
tech-c:         SM2111-AP
auth:           # Filtered
remarks:        itss_network@hq.a-star.edu.sg was validated on 2025-05-27
mnt-by:         MAINT-A-STAR-SG
last-modified:  2025-05-27T23:19:23Z
source:         APNIC

role:           ABUSE ASTARSG
country:        ZZ
address:        Agency for Science, Technology and Research
address:        
address:        
address:        
phone:          +000000000
e-mail:         ITSS_Network@hq.a-star.edu.sg
admin-c:        SM2111-AP
tech-c:         SM2111-AP
nic-hdl:        AA1894-AP
remarks:        Generated from irt object IRT-A-STAR-SG
remarks:        itss_network@hq.a-star.edu.sg was validated on 2025-05-27
abuse-mailbox:  ITSS_Network@hq.a-star.edu.sg
mnt-by:         APNIC-ABUSE
last-modified:  2025-05-27T23:19:56Z
source:         APNIC

person:         ITSS Network
address:        30 Biopolis Street
country:        SG
phone:          +65-64074300
e-mail:         ITSS_Network@hq.a-star.edu.sg
nic-hdl:        IN139-AP
mnt-by:         MAINT-A-STAR-SG
last-modified:  2022-05-12T01:54:16Z
source:         APNIC

route:          123.136.64.0/21
origin:         AS23767
descr:          A*STAR Agency For Science, Technology And Research 1 Fusionopolis Way,
mnt-by:         MAINT-A-STAR-SG
last-modified:  2019-02-14T01:10:43Z
source:         APNIC

Nearby Ranges

BGP prefixes that overlap with 123.136.0.0/16

Range	ASN	Company	Num of IPs
123.136.32.0/19	AS7600	EscapeNet	8,192
123.136.96.0/19	AS38466	U Mobile Sdn Bhd	8,192
123.136.24.0/21	AS38493	Royal Green Communication Limited	2,048
123.136.104.0/22	AS38466	U Mobile Sdn Bhd	1,024
123.136.18.0/23	AS38468	Yes Bank Ltd	512
123.136.102.0/23	AS38466	U Mobile Sdn Bhd	512
123.136.16.0/23	AS38468	Yes Bank Ltd	512
123.136.188.0/23	AS45528	Tikona Infinet Ltd.	512
123.136.20.0/23	AS38468	Yes Bank Ltd	512
123.136.22.0/23	AS38468	Yes Bank Ltd	512
123.136.69.0/24	AS23767	Agency for Science, Technology and Research	256
123.136.71.0/24	AS23767	Agency for Science, Technology and Research	256
123.136.204.0/24	AS45528	Tikona Infinet Ltd.	256
123.136.10.0/24	AS137872	China Mobile Hong Kong Company Limited	256
123.136.17.0/24	AS38468	Yes Bank Ltd	256
123.136.135.0/24	AS45528	Tikona Infinet Ltd.	256
123.136.25.0/24	AS38493	Royal Green Limited	256
123.136.130.0/24	AS45528	Tikona Infinet Ltd.	256
123.136.198.0/24	AS45528	Tikona Infinet Ltd.	256
123.136.24.0/24	AS38493	Royal Green Limited	256
123.136.121.0/24	AS38466	U Mobile Sdn Bhd	256
123.136.104.0/24	AS38466	U Mobile Sdn Bhd	256
123.136.181.0/24	AS45528	Tikona Infinet Ltd.	256
123.136.161.0/24	AS45528	Tikona Infinet Ltd.	256
123.136.203.0/24	AS45528	Tikona Infinet Ltd.	256
123.136.168.0/24	AS45528	Tikona Infinet Ltd.	256
123.136.66.0/24	AS23767	Agency for Science, Technology and Research	256
123.136.216.0/24	AS45528	Tikona Infinet Ltd.	256
123.136.171.0/24	AS45528	Tikona Infinet Ltd.	256
123.136.227.0/24	AS45528	Tikona Infinet Ltd.	256
123.136.213.0/24	AS45528	Tikona Infinet Ltd.	256
123.136.179.0/24	AS45528	Tikona Infinet Ltd.	256
123.136.16.0/24	AS38468	Yes Bank Ltd	256
123.136.153.0/24	AS45528	Tikona Infinet Ltd.	256
123.136.7.0/24	AS137872	China Mobile Hong Kong Company Limited	256
123.136.101.0/24	AS38466	U Mobile Sdn Bhd	256
123.136.184.0/24	AS45528	Tikona Infinet Ltd.	256
123.136.6.0/24	AS137872	China Mobile Hong Kong Company Limited	256
123.136.9.0/24	AS137872	China Mobile Hong Kong Company Limited	256
123.136.133.0/24	AS45528	Tikona Infinet Ltd.	256
123.136.4.0/24	AS137872	China Mobile Hong Kong Company Limited	256
123.136.8.0/24	AS137872	China Mobile Hong Kong Company Limited	256
123.136.20.0/24	AS38468	Yes Bank Ltd	256
123.136.113.0/24	AS38466	U Mobile Sdn Bhd	256
123.136.137.0/24	AS45528	Tikona Infinet Ltd.	256
123.136.18.0/24	AS38468	Yes Bank Ltd	256
123.136.19.0/24	AS38468	Yes Bank Ltd	256
123.136.26.0/24	AS38493	Royal Green Limited	256
123.136.131.0/24	AS45528	MOBIUS KNOWLEDGE SERVICES PVT LTD	256

Hosted domains

There are no domains currently hosted on this ASN.

Hosted domains API

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Useful for Cybersecurity

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Pingable IPs

2 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address	ASN	Details
123.136.64.7	AS23767 A-STAR	0.70ms from Singapore, SG

Other Pingable IPs

Below is a random selection of 25 IPs that replied to an ICMP ping during our most recent internet scan.

IP Address	ASN	Details
79.166.30.152	AS3329 VODAFONE-PANAFON HELLENIC TELECOMMUNICATIONS COMPANY SA	1.69ms from Athens, GR
181.49.76.56	AS14080 Telmex Colombia S.A.	1.58ms from Bogota, CO
220.174.180.8	AS4134 CHINANET-BACKBONE	2.39ms from Haikou, CN
79.55.165.88	AS3269 Telecom Italia S.p.A.	16.75ms from Palermo, IT
60.113.227.232	AS17676 SoftBank Corp.	2.81ms from Tokyo, JP
61.197.23.216	AS2514 NTT PC Communications, Inc.	5.25ms from Tokyo, JP
177.206.36.8	AS18881 TELEFÔNICA BRASIL S.A	8.63ms from Rio de Janeiro, BR
175.41.183.248	AS16509 Amazon.com, Inc.	0.13ms from Singapore, SG
181.121.198.232	AS23201 Telecel S.A.	9.71ms from Asuncion, PY
95.56.44.72	AS9198 JSC Kazakhtelecom	4.68ms from Karagandy, KZ
125.14.185.8	AS9824 JCOM Co., Ltd.	11.48ms from Tokyo, JP
52.8.28.184	AS16509 Amazon.com, Inc.	0.12ms from San Jose, US
135.220.96.216	AS8075 Microsoft Corporation	0.24ms from Frankfurt am Main, DE
65.20.105.232	AS20473 The Constant Company, LLC	0.16ms from Madrid, ES
83.49.182.88	AS3352 TELEFONICA DE ESPANA S.A.U.	11.39ms from Madrid, ES
73.214.255.120	AS7922 Comcast Cable Communications, LLC	16.71ms from Piscataway, US
153.198.26.40	AS4713 NTT Communications Corporation	7.89ms from Tokyo, JP
209.15.100.88	AS135566 Thailand Government Data Center and Cloud service (TGDCC)	0.27ms from Bangkok, TH
91.177.118.136	AS5432 Proximus NV	4.65ms from Gravelines, FR
223.119.191.24	AS58453 China Mobile International Limited	0.26ms from Johannesburg, ZA
58.172.219.88	AS1221 Telstra Limited	11.16ms from Melbourne, AU
213.26.218.120	AS3269 Telecom Italia S.p.A.	8.69ms from Milan, IT
4.233.187.248	AS8075 Microsoft Corporation	0.89ms from Paris, FR
179.188.17.88	AS27715 Locaweb Serviços de Internet S/A	0.99ms from Sao Paulo, BR
159.196.173.184	AS4764 Aussie Broadband	0.88ms from Sydney, AU

What are IP address ranges?

IP address ranges, or netblocks, are groups of related IP addresses. They are usually represented as a base IP address, followed by a slash, and then a netmask which represents how many IP addresses are contained within the netblock. This format is known as CIDR. You'll also sometimes see netblocks given as a start ip address, and an end ip address, or an ip address range.

Traffic works its way around the internet based on the routing table, which contains a list of networks and their associated netblocks.

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