123.51.0.0/24

AS38333 · Symbio Networks

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Summary

Country	Australia
Domain	telcoinabox.com
ASN	AS38333
Parent Range	123.51.0.0/17
Registry	APNIC
ID	TELCOINABOX-AU

WHOIS Details

inetnum:        123.51.0.0 - 123.51.0.255
netname:        TELCOINABOX-AU
descr:          Level 6, 9-13 Young Street
country:        AU
admin-c:        TPLn2-AP
tech-c:         TPLn2-AP
abuse-c:        AI731-AP
status:         ASSIGNED NON-PORTABLE
mnt-by:         MAINT-INABOX-AU
mnt-irt:        IRT-INABOX-AU
last-modified:  2021-06-16T13:03:48Z
source:         APNIC

irt:            IRT-INABOX-AU
address:        L3, 580 George Street, Sydney NSW 2000
e-mail:         [email protected]
abuse-mailbox:  [email protected]
admin-c:        TOPL2-AP
tech-c:         TOPL2-AP
auth:           # Filtered
remarks:        [email protected] was validated on 2025-12-01
mnt-by:         MAINT-INABOX-AU
last-modified:  2025-12-01T04:18:34Z
source:         APNIC

role:           ABUSE INABOXAU
country:        ZZ
address:        L3, 580 George Street, Sydney NSW 2000
phone:          +000000000
e-mail:         [email protected]
admin-c:        TOPL2-AP
tech-c:         TOPL2-AP
nic-hdl:        AI731-AP
remarks:        Generated from irt object IRT-INABOX-AU
remarks:        [email protected] was validated on 2025-12-01
abuse-mailbox:  [email protected]
mnt-by:         APNIC-ABUSE
last-modified:  2025-12-01T04:18:46Z
source:         APNIC

role:           TELCOINABOX PTY LTD - network administrator
address:        Level 10, 9 Hunter Street
country:        AU
phone:          +6182489099
e-mail:         [email protected]
admin-c:        TPLn2-AP
tech-c:         TPLn2-AP
nic-hdl:        TPLn2-AP
mnt-by:         MAINT-TELCOINABOX-AU
last-modified:  2017-06-21T06:01:19Z
source:         APNIC

route:          123.51.0.0/24
origin:         AS45510
descr:          Telcoinabox Operations Pty Ltd L4, 580 George St
mnt-by:         MAINT-INABOX-AU
last-modified:  2022-02-11T06:16:24Z
source:         APNIC

Overlapping Ranges

BGP prefixes that contain 123.51.0.0/24

Range	ASN	Company	Num of IPs
123.51.0.0/17	AS38333	Telcoinabox Operations Pty Ltd	32,768
123.51.0.0/17	AS45510	Telcoinabox Operations Pty Ltd	32,768

Nearby Ranges

BGP prefixes that overlap with 123.51.0.0/16

Range	ASN	Company	Num of IPs
123.51.128.0/17	AS4780	New Century InfoComm Tech. Co., Ltd.	32,768
123.51.0.0/17	AS38333	Telcoinabox Operations Pty Ltd	32,768
123.51.128.0/17	AS9919	New Century InfoComm Tech. Co., Ltd.	32,768
123.51.0.0/17	AS45510	Telcoinabox Operations Pty Ltd	32,768
123.51.172.0/22	AS4780	New Century InfoComm Tech. Co., Ltd.	1,024
123.51.220.0/22	AS4780	New Century InfoComm Tech. Co., Ltd.	1,024
123.51.220.0/22	AS9919	New Century InfoComm Tech. Co., Ltd.	1,024
123.51.132.0/22	AS4780	New Century InfoComm Tech. Co., Ltd.	1,024
123.51.160.0/22	AS4780	New Century InfoComm Tech. Co., Ltd.	1,024
123.51.168.0/22	AS4780	New Century InfoComm Tech. Co., Ltd.	1,024
123.51.128.0/22	AS9919	New Century InfoComm Tech. Co., Ltd.	1,024
123.51.132.0/22	AS9919	New Century InfoComm Tech. Co., Ltd.	1,024
123.51.160.0/22	AS9919	New Century InfoComm Tech. Co., Ltd.	1,024
123.51.164.0/22	AS9919	New Century InfoComm Tech. Co., Ltd.	1,024
123.51.168.0/22	AS9919	New Century InfoComm Tech. Co., Ltd.	1,024
123.51.172.0/22	AS9919	New Century InfoComm Tech. Co., Ltd.	1,024
123.51.188.0/24	AS9919	New Century InfoComm Tech. Co., Ltd.	256
123.51.193.0/24	AS9919	New Century InfoComm Tech. Co., Ltd.	256
123.51.194.0/24	AS9919	New Century InfoComm Tech. Co., Ltd.	256
123.51.195.0/24	AS9919	New Century InfoComm Tech. Co., Ltd.	256
123.51.181.0/24	AS4780	New Century InfoComm Tech. Co., Ltd.	256
123.51.196.0/24	AS9919	New Century InfoComm Tech. Co., Ltd.	256
123.51.197.0/24	AS9919	New Century InfoComm Tech. Co., Ltd.	256
123.51.198.0/24	AS9919	New Century InfoComm Tech. Co., Ltd.	256
123.51.199.0/24	AS9919	New Century InfoComm Tech. Co., Ltd.	256
123.51.208.0/24	AS9919	New Century InfoComm Tech. Co., 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

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

IP Address	ASN	Details
123.51.0.161	AS38333 Symbio Networks	`23.65ms` from Sydney, AU

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
104.6.219.184	AS7018 AT&T Enterprises, LLC	`1.30ms` from Atlanta, US
91.182.178.152	AS5432 Proximus NV	`2.42ms` from Brussels, BE
76.181.154.72	AS10796 Charter Communications Inc	`6.61ms` from Columbus, US
173.222.49.24	AS16625 Akamai Technologies, Inc.	`0.21ms` from Dallas, US
52.117.222.152	AS36351 IBM Cloud	`1.07ms` from Dallas, US
69.150.201.168	AS7018 AT&T Enterprises, LLC	`5.97ms` from Dallas, US
192.8.195.248	AS24084 PLOT NO: 3A, SECTOR 126, SEZ, NOIDA	`2.66ms` from Delhi, IN
187.140.21.120	AS8151 UNINET	`5.23ms` from Guadalajara, MX
146.196.83.88	AS55933 Cloudie Limited	`1.25ms` from Hong Kong, HK
196.22.132.8	AS37153 Xneelo (Pty) Ltd	`0.12ms` from Johannesburg, ZA
170.28.32.8	AS12187 Metropolitan Transportation Authority	`1.25ms` from New York City, US
126.49.232.56	AS17676 SoftBank Corp.	`3.97ms` from Osaka, JP
66.122.32.88	AS7018 AT&T Enterprises, LLC	`2.74ms` from San Jose, US
126.77.95.120	AS17676 SoftBank Corp.	`2.25ms` from Tokyo, JP
38.99.186.40	AS174 Cogent Communications, LLC	`0.52ms` from Toronto, CA
31.165.167.40	AS6730 Sunrise GmbH	`1.83ms` from Zuerich, CH
111.166.195.56	AS4837 CHINA UNICOM China169 Backbone	`5.26ms` from Beijing, CN
105.159.164.40	AS36903 Office National des Postes et Telecommunications ONPT (Maroc Telecom) / IAM	`6.00ms` from Casablanca, MA
62.227.61.248	AS3320 Deutsche Telekom AG	`5.93ms` from Frankfurt am Main, DE
82.102.13.216	AS20860 IOMART CLOUD SERVICES LIMITED	`1.03ms` from London, GB
98.153.61.136	AS20001 Charter Communications Inc	`0.38ms` from Los Angeles, US
189.144.230.40	AS8151 UNINET	`1.08ms` from Mexico City, MX
218.219.251.200	AS4685 Asahi Net	`0.27ms` from Osaka, JP
90.88.52.8	AS3215 Orange S.A.	`13.91ms` from Paris, FR
67.80.13.248	AS6128 Cablevision Systems Corp.	`9.63ms` from Piscataway, US

Traceroute

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

traceroute -a -n -q1 -f2 123.51.0.223

traceroute to 123.51.0.223 (123.51.0.223): 64 hops max, 52 byte packets

2 [] 103.26.69.78 1.244 ms

3 [AS38333] 123.51.0.223 24.543 ms

Measurement taken from

IPinfo ProbeNet in Sydney, AU

On December 6th 2025

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.

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