123.51.64.0/23

AS38333 · Symbio Networks

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Summary

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

WHOIS Details

inetnum:        123.51.0.0 - 123.51.127.255
netname:        INABOX-AU
descr:          Telcoinabox Operations Pty Ltd
descr:          L10, 9 Hunter Street, Sydney NSW 2000
country:        AU
org:            ORG-TOPL1-AP
admin-c:        TOPL2-AP
tech-c:         TOPL2-AP
abuse-c:        AI731-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-INABOX-AU
mnt-routes:     MAINT-INABOX-AU
mnt-irt:        IRT-INABOX-AU
last-modified:  2020-11-25T13:04:09Z
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

organisation:   ORG-TOPL1-AP
org-name:       Telcoinabox Operations Pty Ltd
org-type:       LIR
country:        AU
address:        L3, 580 George St
phone:          +61-2-82756871
e-mail:         [email protected]
mnt-ref:        APNIC-HM
mnt-by:         APNIC-HM
last-modified:  2024-12-20T12:58:47Z
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 Operations Pty Ltd administrator
address:        L4, 580 George Street, Sydney NSW 2000
country:        AU
phone:          +61-2-82489034
fax-no:         +61-2-82489034
e-mail:         [email protected]
admin-c:        TOPL2-AP
tech-c:         TOPL2-AP
nic-hdl:        TOPL2-AP
mnt-by:         MAINT-INABOX-AU
last-modified:  2019-05-31T05:16:03Z
source:         APNIC

route:          123.51.0.0/17
origin:         AS38333
descr:          Telcoinabox Operations Pty Ltd L4, 580 George St
mnt-by:         MAINT-INABOX-AU
last-modified:  2021-10-18T23:00:22Z
source:         APNIC

route:          123.51.0.0/17
origin:         AS45510
descr:          Telcoinabox Operations Pty Ltd L4, 580 George St
mnt-by:         MAINT-INABOX-AU
last-modified:  2022-02-11T06:16:23Z
source:         APNIC

Overlapping Ranges

BGP prefixes that contain 123.51.64.0/23

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
123.51.0.0/24	AS38333	Level 6, 9-13 Young Street	256
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 is 1 domain name hosted across 1 IP address on this ASN. Checkout our API to access full domain hosting information.

IP Address	Domain	Domains on this IP

Hosted domains API

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Useful for Cybersecurity

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Pingable IPs

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

IP Address	ASN	Details
123.51.64.108	AS38333 Symbio Networks	`20.70ms` from Sydney, AU
123.51.65.113	AS38333 Symbio Networks	`23.82ms` 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
45.37.104.135	AS11426 Charter Communications Inc	`9.19ms` from Ashburn, US
67.7.172.55	AS393789 CenturyLink Communications, LLC	`5.61ms` from Chicago, US
18.221.11.151	AS16509 Amazon.com, Inc.	`0.19ms` from Columbus, US
40.86.123.87	AS8075 Microsoft Corporation	`0.17ms` from Des Moines, US
176.37.83.215	AS39608 Lanet Network Ltd	`0.58ms` from Kyiv, UA
175.175.135.151	AS4837 CHINA UNICOM China169 Backbone	`9.51ms` from Liaoyang, CN
107.202.62.55	AS7018 AT&T Enterprises, LLC	`9.99ms` from Miami, US
90.58.139.199	AS3215 Orange S.A.	`9.00ms` from Paris, FR
52.202.10.247	AS14618 Amazon.com, Inc.	`0.19ms` from Reston, US
97.126.73.135	AS209 CenturyLink Communications, LLC	`1.60ms` from Seattle, US
102.155.47.167	AS327934 SOCIETE NATIONALE DES TELECOMMUNICATIONS (Tunisie Telecom)	`14.77ms` from Tunis, TN
109.203.62.87	AS39544 VOe multimedia SA	`10.23ms` from Zuerich, CH
152.118.24.87	AS3382 University of Indonesia	`2.31ms` from Jakarta, ID
51.103.148.199	AS8075 Microsoft Corporation	`0.18ms` from Kloten, CH
62.87.106.151	AS12430 VODAFONE ESPANA S.A.U.	`15.56ms` from Madrid, ES
146.70.59.151	AS9009 M247 Europe SRL	`0.05ms` from Madrid, ES
73.46.214.103	AS7922 Comcast Cable Communications, LLC	`3.93ms` from Miami, US
34.75.100.167	AS396982 Google LLC	`0.13ms` from Moncks Corner, US
185.27.163.151	AS43226 Data Storage Center JSC	`0.82ms` from Moscow, RU
68.107.129.247	AS22773 Cox Communications Inc.	`4.73ms` from Phoenix, US
37.6.23.215	AS25472 Nova Telecommunications & Media Single Member S.A	`17.76ms` from Thessaloniki, GR
64.223.234.55	AS13977 Fidium	`2.43ms` from Boston, US
188.36.1.151	AS5483 Magyar Telekom Plc.	`3.48ms` from Budapest, HU
13.59.101.23	AS16509 Amazon.com, Inc.	`0.13ms` from Columbus, US
68.237.131.55	AS174 Cogent Communications, LLC	`6.82ms` from Kansas City, US

Traceroute

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

traceroute -a -n -q1 -f6 123.51.65.143

traceroute to 123.51.65.143 (123.51.65.143): 64 hops max, 52 byte packets

6 [AS38333] 123.51.65.143 27.223 ms

Measurement taken from

IPinfo ProbeNet in Sydney, AU

On December 15th 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.

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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