146.189.128.0/21

AS5724 · University of Massachusetts Medical School

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Summary

Country	United States
Domain	umassmed.edu
ASN	AS5724
Parent Range	146.189.0.0/16
Registry	ARIN
ID	UMASSMED

WHOIS Details

NetHandle:      NET-146-189-0-0-1
OrgID:          UMMC-1-Z
Parent:         NET-146-0-0-0-0
NetName:        UMASSMED
NetRange:       146.189.0.0 - 146.189.255.255
NetType:        allocation
RegDate:        1991-02-26
Updated:        2023-07-01
TechHandle:     HOSTE28-ARIN
Source:         ARIN


OrgID:          UMMC-1-Z
OrgName:        University of Massachusetts Medical School
CanAllocate:    
Street:         55 Lake Avenue North
City:           Worcester
State/Prov:     MA
Country:        US
PostalCode:     01655
RegDate:        2023-06-20
Updated:        2023-06-20
OrgAdminHandle: HOSTE28-ARIN
OrgTechHandle:  HOSTE28-ARIN
OrgAbuseHandle: HOSTE28-ARIN
OrgNOCHandle:   HOSTE28-ARIN
Source:         ARIN


POCHandle:      HOSTE28-ARIN
IsRole:         Y
LastName:       Hosted Services
FirstName:      
Street:         333 South Street
City:           Shrewsbury
State/Prov:     MA
Country:        US
PostalCode:     01545-4169
RegDate:        2017-06-20
Updated:        2025-01-07
OfficePhone:    +1-508-612-1138
Mailbox:        HostedServices@umassmed.edu
Source:         ARIN

Overlapping Ranges

BGP prefixes that contain 146.189.128.0/21

Range	ASN	Company	Num of IPs
146.189.0.0/16	AS5724	University of Massachusetts Medical School	65,536

Nearby Ranges

BGP prefixes that overlap with 146.189.0.0/16

Range	ASN	Company	Num of IPs
146.189.0.0/16	AS5724	University of Massachusetts Medical School	65,536

Hosted domains

There are no domains currently hosted on this ASN.

Hosted domains API

Our Hosted Domains API, or Reverse IP API returns a full list of domains that are hosted on a single IP address.

Useful for Cybersecurity

Read more

Pingable IPs

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

IP Address	ASN	Details
146.189.128.250	AS5724 University of Massachusetts Medical School	`2.00ms` from Boston, 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
80.241.43.165	AS21299 Kar-Tel LLC	`1.31ms` from Almaty, KZ
170.205.4.5	AS13347 Midwest Cable	`0.40ms` from Ashburn, US
110.240.118.21	AS4837 CHINA UNICOM China169 Backbone	`8.32ms` from Beijing, CN
1.141.18.229	AS1221 Telstra Limited	`2.26ms` from Brisbane, AU
131.228.59.21	AS10455 Nokia of America Corporation	`1.52ms` from Chicago, US
189.139.114.117	AS8151 UNINET	`1.88ms` from Mexico City, MX
2.113.205.149	AS3269 Telecom Italia S.p.A.	`0.68ms` from Milan, IT
217.173.74.85	AS8595 OOO WestCall Ltd.	`1.61ms` from Moscow, RU
104.131.222.117	AS14061 DigitalOcean, LLC	`0.68ms` from New York City, US
84.152.214.229	AS3320 Deutsche Telekom AG	`5.47ms` from Nuernberg, DE
126.29.206.133	AS17676 SoftBank Corp.	`7.63ms` from Osaka, JP
34.147.13.165	AS396982 Google LLC	`0.13ms` from Oudeschip, NL
195.117.147.165	AS5617 Orange Polska Spolka Akcyjna	`3.90ms` from Poznan, PL
3.85.118.213	AS14618 Amazon.com, Inc.	`0.45ms` from Reston, US
52.73.247.37	AS14618 Amazon.com, Inc.	`0.17ms` from Reston, US
83.243.72.21	AS29329 Resource-M LLC	`0.82ms` from Saint Petersburg, RU
209.120.195.245	AS3257 GTT Communications Inc.	`0.32ms` from San Jose, US
175.233.156.5	AS4766 Korea Telecom	`2.77ms` from Seoul, KR
175.164.85.165	AS4837 CHINA UNICOM China169 Backbone	`2.05ms` from Tieling, CN
73.122.197.37	AS7922 Comcast Cable Communications, LLC	`4.87ms` from Atlanta, US
75.2.118.149	AS16509 Amazon.com, Inc.	`0.04ms` from Bangkok, TH
20.9.111.69	AS8075 Microsoft Corporation	`0.20ms` from Des Moines, US
2.205.52.5	AS3209 Vodafone GmbH	`6.40ms` from Duesseldorf, DE
3.123.78.85	AS16509 Amazon.com, Inc.	`0.19ms` from Frankfurt am Main, DE
218.255.186.245	AS9381 HKBN Enterprise Solutions HK Limited	`0.69ms` from Hong Kong, HK

Traceroute

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

traceroute -a -n -q1 -f2 146.189.128.3

traceroute to 146.189.128.3 (146.189.128.3): 64 hops max, 52 byte packets

2 [AS749] 26.20.160.1 1.442 ms

3 *

4 [AS45102] 116.251.86.202 17.456 ms

5 [AS2914] 203.131.242.185 1.818 ms

6 [AS2914] 129.250.2.148 1.994 ms

7 [AS2914] 168.143.191.67 198.161 ms

8 [AS11776] 23.245.0.121 203.395 ms

9 [AS11776] 23.245.3.102 201.268 ms

10 *

11 [AS5724] 146.189.128.3 212.84 ms

Measurement taken from

IPinfo ProbeNet in Hong Kong, HK

On January 19th 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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