143.58.8.0/22

AS29120 · Mayer Brown International LLP

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Summary

Country	United States
Domain	mayerbrown.com
ASN	AS29120
Registry	ARIN
ID	MBRM-NET

WHOIS Details

NetHandle:      NET-143-58-0-0-1
OrgID:          MBRML
Parent:         NET-143-0-0-0-0
NetName:        MBRM-NET
NetRange:       143.58.0.0 - 143.58.63.255
NetType:        allocation
RegDate:        1990-03-26
Updated:        2022-04-06
Source:         ARIN


OrgID:          MBRML
OrgName:        Mayer Brown LLP
CanAllocate:    
Street:         71 S. Wacker
City:           Chicago
State/Prov:     IL
Country:        US
PostalCode:     60606
RegDate:        2006-01-12
Updated:        2016-07-12
OrgAdminHandle: BARRA15-ARIN
OrgTechHandle:  MCS7-ARIN
OrgAbuseHandle: MCS7-ARIN
Source:         ARIN


POCHandle:      BARRA15-ARIN
IsRole:         N
LastName:       Barratt
FirstName:      Mark
Street:         311 W. Monroe
City:           Chicago
State/Prov:     IL
Country:        US
PostalCode:     60606
RegDate:        2013-12-03
Updated:        2025-07-16
OfficePhone:    +1-312-701-8836
Mailbox:        mbarratt@mayerbrown.com
Source:         ARIN


POCHandle:      MCS7-ARIN
IsRole:         N
LastName:       Sherman
FirstName:      Michael
Street:         230 South LaSalle Street
City:           Chicago
State/Prov:     IL
Country:        US
PostalCode:     60604
RegDate:        2006-01-09
Updated:        2022-02-17
OfficePhone:    +1-312-701-8315
Mailbox:        msherman@mayerbrown.com
Source:         ARIN

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

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

IP Address	ASN	Details
143.58.9.201	AS29120 Mayer Brown International LLP	`1.96ms` from London, GB
143.58.8.1	AS29120 Mayer Brown International LLP	`1.40ms` from London, GB

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
91.151.48.166	AS204273 SPIE ICS SASU	`0.94ms` from Aubervilliers, FR
176.188.16.166	AS5410 Bouygues Telecom SA	`2.81ms` from Aubervilliers, FR
99.125.229.38	AS7018 AT&T Enterprises, LLC	`2.26ms` from Dallas, US
155.140.84.22	AS25215 BNP PARIBAS S.A.	`6.90ms` from Frankfurt am Main, DE
202.85.65.214	AS4515 PCCW IMS Ltd (PCCW Business Internet Access)	`1.90ms` from Hong Kong, HK
176.49.92.214	AS12389 PJSC Rostelecom	`1.13ms` from Krasnoyarsk, RU
86.221.199.70	AS3215 Orange S.A.	`11.55ms` from Lausanne, CH
149.71.26.150	AS210619 Monkey Tree Hosting Limited	`1.11ms` from London, GB
81.187.98.230	AS41489 Watchfront Limited	`0.67ms` from London, GB
213.82.250.86	AS3269 Telecom Italia S.p.A.	`6.79ms` from Milan, IT
46.229.216.70	AS199860 Xelent	`0.45ms` from Saint Petersburg, RU
50.191.26.214	AS7922 Comcast Cable Communications, LLC	`5.08ms` from Seattle, US
122.225.152.182	AS4809 China Telecom Next Generation Carrier Network	`11.07ms` from Shanghai, CN
40.126.151.214	AS8075 Microsoft Corporation	`4.78ms` from Sydney, AU
43.167.235.86	AS132203 Tencent Building, Kejizhongyi Avenue	`1.15ms` from Tokyo, JP
210.252.213.86	AS4725 SoftBank Corp.	`12.09ms` from Tokyo, JP
39.103.130.134	AS37963 Hangzhou Alibaba Advertising Co.,Ltd.	`0.81ms` from Zhangjiakou, CN
69.143.177.182	AS7922 Comcast Cable Communications, LLC	`7.37ms` from Ashburn, US
171.5.52.118	AS45758 Triple T Broadband Public Company Limited	`11.68ms` from Bangkok, TH
20.80.225.246	AS8075 Microsoft Corporation	`0.16ms` from Boydton, US
156.196.94.230	AS8452 TE-AS	`4.21ms` from Cairo, EG
79.201.47.214	AS3320 Deutsche Telekom AG	`4.93ms` from Frankfurt am Main, DE
36.91.44.230	AS7713 PT Telekomunikasi Indonesia	`0.74ms` from Jakarta, ID
149.50.11.246	AS42611 Full Fibre Limited	`2.37ms` from London, GB
139.68.217.22	AS23089 Hotwire Communications	`0.95ms` from Los Angeles, US

Traceroute

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

traceroute -a -n -q1 -m7 143.58.11.221

traceroute to 143.58.11.221 (143.58.11.221): 7 hops max, 52 byte packets

1 [AS15169] 142.250.214.161 9.813 ms

2 *

3 *

4 [AS3356] 212.133.113.130 84.912 ms

5 *

6 *

7 *

Measurement taken from

IPinfo ProbeNet in Columbus, US

On September 4th 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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