103.5.218.0/23

AS137538 · Caldawin Software Technology Company Limited

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Summary

Country	Macao
Domain	caldawin.com
ASN	AS137538
Registry	APNIC
ID	CSTCL-MO

WHOIS Details

inetnum:        103.5.218.0 - 103.5.219.255
netname:        CSTCL-MO
descr:          Caldawin Software Technology Company Limited
country:        MO
org:            ORG-CSTC2-AP
admin-c:        CSTC2-AP
tech-c:         CSTC2-AP
abuse-c:        AC2617-AP
status:         ALLOCATED PORTABLE
remarks:        --------------------------------------------------------
remarks:        To report network abuse, please contact mnt-irt
remarks:        For troubleshooting, please contact tech-c and admin-c
remarks:        Report invalid contact via www.apnic.net/invalidcontact
remarks:        --------------------------------------------------------
mnt-by:         APNIC-HM
mnt-lower:      MAINT-CSTCL-MO
mnt-routes:     MAINT-CSTCL-MO
mnt-irt:        IRT-CSTCL-MO
last-modified:  2022-09-15T04:30:06Z
source:         APNIC

irt:            IRT-CSTCL-MO
address:        5 Andar A, Finance and IT Center of Macau, 70 Avenida Comercial de Macau, Macau Macau 999078
e-mail:         info@caldawin.com
abuse-mailbox:  info@caldawin.com
admin-c:        CSTC2-AP
tech-c:         CSTC2-AP
auth:           # Filtered
remarks:        info@caldawin.com was validated on 2026-01-27
mnt-by:         MAINT-CSTCL-MO
last-modified:  2026-01-27T13:39:45Z
source:         APNIC

organisation:   ORG-CSTC2-AP
org-name:       Caldawin Software Technology Company Limited
org-type:       LIR
country:        MO
address:        5 Andar A, Finance and IT Center of Macau
address:        70 Avenida Comercial de Macau
phone:          +853-6588-8368
e-mail:         info@caldawin.com
mnt-ref:        APNIC-HM
mnt-by:         APNIC-HM
last-modified:  2023-09-05T02:18:59Z
source:         APNIC

role:           ABUSE CSTCLMO
country:        ZZ
address:        5 Andar A, Finance and IT Center of Macau, 70 Avenida Comercial de Macau, Macau Macau 999078
phone:          +000000000
e-mail:         info@caldawin.com
admin-c:        CSTC2-AP
tech-c:         CSTC2-AP
nic-hdl:        AC2617-AP
remarks:        Generated from irt object IRT-CSTCL-MO
remarks:        info@caldawin.com was validated on 2026-01-27
abuse-mailbox:  info@caldawin.com
mnt-by:         APNIC-ABUSE
last-modified:  2026-01-27T13:40:16Z
source:         APNIC

role:           Caldawin Software Technology Company Limited administrator
address:        5 Andar A, Finance and IT Center of Macau, 70 Avenida Comercial de Macau, Macau Macau 999078
country:        MO
phone:          +853-6588-8368
e-mail:         info@caldawin.com
admin-c:        CSTC2-AP
tech-c:         CSTC2-AP
nic-hdl:        CSTC2-AP
mnt-by:         MAINT-CSTCL-MO
last-modified:  2023-10-20T18:25:55Z
source:         APNIC

route:          103.5.218.0/23
origin:         AS137538
descr:          Caldawin Software Technology Company Limited 5 Andar A, Finance and IT Center of Macau 70 Avenida Comercial de Macau
mnt-by:         MAINT-CSTCL-MO
last-modified:  2022-09-15T05:08:35Z
source:         APNIC

Nearby Ranges

BGP prefixes that overlap with 103.5.0.0/16

Range	ASN	Company	Num of IPs
103.5.128.0/22	AS17573	SK Broadband Co Ltd	1,024
103.5.116.0/22	AS17408	M-SQUARE, Inc.	1,024
103.5.12.0/22	AS16276	2 Rue Kellermann	1,024
103.5.160.0/22	AS15412	Ginza 1-15-7 MAC Giza Bldg 3F	1,024
103.5.112.0/22	AS131459	Vijaya Comnet Private Limited	1,024
103.5.236.0/22	AS9930	TT DOTCOM SDN BHD	1,024
103.5.176.0/22	AS55894	Who's Next	1,024
103.5.4.0/22	AS55821	RADIUS TELECOMS, INC.	1,024
103.5.44.0/22	AS45634	Magna Hosting Ltd	1,024
103.5.100.0/22	AS38851	Chief Telecom Inc.	1,024
103.5.232.0/22	AS38592	Chittagong Online Limited.	1,024
103.5.180.0/22	AS132035	Computer Center	1,024
103.5.224.0/22	AS132042	Manux Networks Ltd	1,024
103.5.96.0/22	AS38333	Telcoinabox Operations Pty Ltd	1,024
103.5.208.0/22	AS38253	HTC International telecommunication joint stock company	1,024
103.5.188.0/22	AS38207	RAJESH DIGITAL & DATACOM PRIVATE LIMITED	1,024
103.5.140.0/22	AS131160	Wire and Wireless Co.,Ltd.	1,024
103.5.220.0/22	AS9304	PowerCom Network Hong Kong Ltd	1,024
103.5.156.0/22	AS18119	Capgemini New Zealand Limited	1,024
103.5.212.0/23	AS135516	Level , Suite 30102	512
103.5.0.0/23	AS132021	Kalibo Cable - Main	512
103.5.2.0/23	AS132021	Kalibo Cable - Boracay	512
103.5.216.0/23	AS150316	PR Network	512
103.5.230.0/23	AS24441	CityLink Corporation, LTD	512
103.5.50.0/23	AS58381	Wow Internet Indonesia	512
103.5.228.0/23	AS58433	Corporate Office, Kamaladi	512
103.5.110.0/24	AS141226	Gecko Broadband	256
103.5.16.0/24	AS17483	using in Hyd noc	256
103.5.17.0/24	AS17483	using in Hyd noc	256
103.5.18.0/24	AS17483	using in Hyd noc	256
103.5.19.0/24	AS17483	using in Hyd noc	256
103.5.109.0/24	AS141226	Gecko Broadband	256
103.5.108.0/24	AS141226	Gecko Broadband	256
103.5.28.0/24	AS58631	Vista Group (NZ) Limited	256
103.5.230.0/24	AS24441	CityLink Corporation, LTD	256
103.5.231.0/24	AS24441	CityLink Corporation, LTD	256
103.5.23.0/24	AS2497	Videx Inc.	256
103.5.106.0/24	AS134778	Illawarra Retirement Trust	256
103.5.79.0/24	AS134753	29/F, Tower 6, The Gateway,	256
103.5.107.0/24	AS38320	PT. Maxindo Network	256
103.5.202.0/24	AS133594	World Phone Internet Services Pvt Ltd	256
103.5.105.0/24	AS132033	Lot 3, Jalan Teknologi 3/5, Taman Sains Selangor	256
103.5.25.0/24	AS132032	DTAC-WIFI-AP02	256
103.5.24.0/24	AS132032	DTAC-WIFI-AP01	256
103.5.44.0/24	AS45634	2F-36 No 163 Nanjing West Road	256
103.5.46.0/24	AS45634	MAINT-MAGNAHOSTINGLTD-TW	256
103.5.47.0/24	AS45634	MAINT-MAGNAHOSTINGLTD-TW	256
103.5.203.0/24	AS48011	Turunc Smart Bilgisayar Teknoloji Ve Dis Ticaret Limited Sirketi	256
103.5.78.0/24	AS132028	Aspire Systems India Private 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

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

IP Address	ASN	Details
103.5.219.1	AS137538 Caldawin Software Technology Company Limited	`1.60ms` from Hong Kong, HK
103.5.218.1	AS137538 Caldawin Software Technology Company Limited	`1.21ms` from Hong Kong, HK

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
208.112.100.199	AS20021 Ntirety, Inc.	`4.12ms` from Ashburn, US
163.182.89.215	AS6181 Cincinnati Bell Telephone Company LLC	`1.89ms` from Cincinnati, US
172.108.225.119	AS5650 Frontier Communications of America, Inc.	`0.37ms` from Dallas, US
212.28.7.167	AS15654 Civica UK Ltd.	`3.87ms` from London, GB
185.195.126.23	AS204239 Abzorb Group Ltd	`5.75ms` from London, GB
109.147.220.103	AS2856 British Telecommunications PLC	`6.11ms` from London, GB
147.127.206.199	AS1715 Renater	`5.86ms` from Marseille, FR
68.60.15.71	AS7922 Comcast Cable Communications, LLC	`12.61ms` from Murfreesboro, US
68.129.46.151	AS701 Verizon Business	`2.19ms` from New York City, US
177.127.64.71	AS28573 Claro NXT Telecomunicacoes Ltda	`3.02ms` from Porto Alegre, BR
95.54.243.87	AS12389 PJSC Rostelecom	`18.00ms` from Saint Petersburg, RU
191.243.168.247	AS263508 SIMNET TELECOMUNICACOES LTDA	`9.03ms` from Sao Paulo, BR
180.158.51.135	AS4812 China Telecom (Group)	`2.58ms` from Shanghai, CN
118.171.33.167	AS3462 Data Communication Business Group	`5.12ms` from Taichung, TW
78.88.182.151	AS29314 VECTRA S.A.	`12.93ms` from Warsaw, PL
77.245.96.231	AS35104 Jusan Mobile JSC	`2.24ms` from Astana, KZ
124.230.33.247	AS4134 CHINANET-BACKBONE	`5.40ms` from Chenzhou, CN
206.180.14.199	AS16410 The Reynolds and Reynolds Company	`6.37ms` from Columbus, US
93.217.134.55	AS3320 Deutsche Telekom AG	`7.43ms` from Frankfurt am Main, DE
137.59.201.87	AS18229 CtrlS	`0.41ms` from Hyderabad, IN
35.152.245.7	AS16509 Amazon.com, Inc.	`0.13ms` from Milan, IT
72.88.195.119	AS701 Verizon Business	`2.23ms` from New York City, US
108.30.161.135	AS701 Verizon Business	`2.45ms` from New York City, US
90.76.64.199	AS3215 Orange S.A.	`18.84ms` from Paris, FR
123.132.72.7	AS4837 CHINA UNICOM China169 Backbone	`8.19ms` from Qingdao, CN

Traceroute

Below is a recent traceroute taken from the IPinfo ProbeNet to an IP in this range. Learn more.

traceroute -a -n -q1 -f5 103.5.218.243

traceroute to 103.5.218.243 (103.5.218.243): 64 hops max, 52 byte packets

5 [AS38623] 36.37.255.206 0.401 ms

6 *

7 [AS24482] 124.6.32.96 31.108 ms

8 *

9 [AS38008] 103.152.35.198 35.411 ms

10 [AS137538] 103.5.218.243 35.538 ms

Measurement taken from

IPinfo ProbeNet in Phnom Penh, KH

On February 7th 2026

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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