143.58.4.0/22

AS19977 · Mayer Brown LLP

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Summary

Country	United States
Domain	mayerbrown.com
ASN	AS19977
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 2 domain names hosted across 2 IP addresses 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

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

IP Address	ASN	Details
143.58.5.28	AS19977 Mayer Brown LLP	`1.16ms` from Chicago, US
143.58.4.1	AS19977 Mayer Brown LLP	`0.72ms` from Chicago, US

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
8.141.100.118	AS37963 Hangzhou Alibaba Advertising Co.,Ltd.	`2.07ms` from Beijing, CN
71.10.63.198	AS20115 Charter Communications LLC	`13.94ms` from Chicago, US
98.100.208.6	AS46810 Twin Disc Incorporated	`6.25ms` from Chicago, US
74.40.33.150	AS5650 Frontier Communications of America, Inc.	`9.85ms` from Chicago, US
78.82.184.118	AS2119 Telenor Norge AS	`2.12ms` from Copenhagen, DK
54.36.136.246	AS16276 OVH SAS	`0.07ms` from Gravelines, FR
121.40.232.54	AS37963 Hangzhou Alibaba Advertising Co.,Ltd.	`4.37ms` from Hangzhou, CN
79.147.195.246	AS3352 TELEFONICA DE ESPANA S.A.U.	`10.61ms` from Madrid, ES
51.148.182.86	AS13037 Zen Internet Ltd	`1.55ms` from Manchester, GB
191.94.21.6	AS27805 UNE EPM TELECOMUNICACIONES S.A.	`7.80ms` from Medellin, CO
73.91.13.150	AS7922 Comcast Cable Communications, LLC	`19.95ms` from Miami, US
63.231.236.182	AS209 CenturyLink Communications, LLC	`2.66ms` from Minneapolis, US
23.30.242.22	AS7922 Comcast Cable Communications, LLC	`8.92ms` from Minneapolis, US
88.167.251.246	AS12322 Free SAS	`19.72ms` from Paris, FR
34.203.136.54	AS14618 Amazon.com, Inc.	`0.20ms` from Reston, US
173.172.130.182	AS11427 Charter Communications Inc	`8.61ms` from Richardson, US
40.118.242.182	AS8075 Microsoft Corporation	`0.57ms` from San Jose, US
177.138.50.22	AS27699 TELEFÔNICA BRASIL S.A	`3.35ms` from Sao Paulo, BR
218.101.202.86	AS17864 SK Broadband Co Ltd	`1.96ms` from Seoul, KR
175.205.141.246	AS4766 Korea Telecom	`2.78ms` from Seoul, KR
211.211.169.86	AS9318 SK Broadband Co Ltd	`7.38ms` from Seoul, KR
84.87.102.134	AS1136 KPN B.V.	`2.32ms` from Amsterdam, NL
37.97.195.118	AS20857 Signet B.V.	`0.58ms` from Amsterdam, NL
64.112.86.150	AS213122 Hyonix	`0.16ms` from Ashburn, US
74.214.177.22	AS3801 Mikrotec Internet Services	`12.83ms` from Ashburn, US

Traceroute

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

traceroute -a -n -q1 -f5 143.58.4.1

traceroute to 143.58.4.1 (143.58.4.1): 64 hops max, 52 byte packets

5 [AS3356] 4.69.203.230 109.693 ms

6 [AS19977] 143.58.4.1 109.329 ms

Measurement taken from

IPinfo ProbeNet in Madrid, ES

On September 11th 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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