198.21.0.0/21

AS11377  ·  SendGrid, Inc.

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Summary

Country United States
Domain sendgrid.com
ASN AS11377
Registry ARIN
ID SENDGRID-198-21-0-0-21

WHOIS Details

NetHandle:      NET-198-21-0-0-1
OrgID:          SENDG-12
Parent:         NET-198-0-0-0-0
NetName:        SENDGRID-198-21-0-0-21
NetRange:       198.21.0.0 - 198.21.7.255
NetType:        allocation
Comment:        http://www.sendgrid.com
Comment:        Standard Support Hours - 7am - 7pm PST
RegDate:        2013-04-01
Updated:        2016-11-11
Source:         ARIN


OrgID:          SENDG-12
OrgName:        SendGrid, Inc.
CanAllocate:    
Street:         Twilio, Inc.
Street:         1801 California Street
Street:         Suite 500
City:           Denver
State/Prov:     CO
Country:        US
PostalCode:     80202
Comment:        http://www.sendgrid.com
Comment:        (888) 985-8363
Comment:        Support hours: M-F, 7a-7p Mountain Time.
RegDate:        2012-06-14
Updated:        2025-06-12
OrgAdminHandle: TSNO-ARIN
OrgTechHandle:  TALSM-ARIN
OrgTechHandle:  TSNO-ARIN
OrgAbuseHandle: ABUSE3074-ARIN
Source:         ARIN


POCHandle:      TALSM-ARIN
IsRole:         N
LastName:       Talsma
FirstName:      Jack
Street:         101 Spear St 5th floor
City:           San Francisco
State/Prov:     CA
Country:        US
PostalCode:     94105
RegDate:        2021-11-18
Updated:        2025-06-03
OfficePhone:    +1-415-390-2337
Mailbox:        netops+arin@sendgrid.com
Source:         ARIN


POCHandle:      ABUSE3074-ARIN
IsRole:         Y
LastName:       Abuse Desk
FirstName:      
Street:         1800 California Street
Street:         Suite 500
City:           Denver
State/Prov:     CO
Country:        US
PostalCode:     80202
RegDate:        2011-06-22
Updated:        2025-06-03
OfficePhone:    +1-888-985-7363
Mailbox:        abuse@sendgrid.com
Source:         ARIN


POCHandle:      TSNO-ARIN
IsRole:         Y
LastName:       Twilio SendGrid Network Operations
FirstName:      
Street:         1801 California Street
Street:         Suite 500
City:           Denver
State/Prov:     CO
Country:        US
PostalCode:     80202
RegDate:        2019-04-17
Updated:        2026-01-06
OfficePhone:    +1-888-985-7363
Mailbox:        netops+arin@sendgrid.com
Source:         ARIN

Nearby Ranges

BGP prefixes that overlap with 198.21.0.0/16

Range ASN Company Num of IPs
198.21.128.0/17 AS12148 Clemson University 32,768
198.21.82.0/23 AS6079 AiroComm, LLC 512

Hosted domains

There are 4 domain names hosted across 4 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address Domain Domains on this IP
198.21.2.223 jawenterprises.net 1
198.21.4.151 todaysales.us 1
198.21.3.53 pccu.net 1
198.21.6.232 emcontracts.com 1

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

Pingable IPs

2,048 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address ASN Details
198.21.3.71 AS11377 SendGrid, Inc. 6.32ms from Los Angeles, US
198.21.2.140 AS11377 SendGrid, Inc. 6.41ms from Los Angeles, US
198.21.6.29 AS11377 SendGrid, Inc. 6.35ms from Los Angeles, US
198.21.4.62 AS11377 SendGrid, Inc. 6.35ms from Los Angeles, US
198.21.7.252 AS11377 SendGrid, Inc. 6.32ms from Los Angeles, US
198.21.0.30 AS11377 SendGrid, Inc. 6.34ms from Los Angeles, US
198.21.1.140 AS11377 SendGrid, Inc. 6.33ms from Los Angeles, US
198.21.5.155 AS11377 SendGrid, Inc. 6.38ms from Los Angeles, 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
123.121.146.245 AS4808 China Unicom Beijing Province Network 4.19ms from Beijing, CN
185.6.144.5 AS44645 PKN GmbH 0.54ms from Berlin, DE
44.224.224.133 AS16509 Amazon.com, Inc. 0.14ms from Boardman, US
76.119.186.229 AS7922 Comcast Cable Communications, LLC 5.87ms from Boston, US
121.45.128.21 AS7545 TPG Telecom Limited 1.91ms from Brisbane, AU
196.200.169.245 AS30983 CNRST (Centre National pour la Recherche Scientifique et Technique) 8.74ms from Casablanca, MA
174.84.95.117 AS20115 Charter Communications LLC 19.31ms from Chicago, US
179.162.142.197 AS18881 TELEFÔNICA BRASIL S.A 13.15ms from Fortaleza, BR
134.130.150.21 AS47610 RWTH Aachen University 4.17ms from Frankfurt am Main, DE
194.30.113.133 AS3262 SAREnet, S.A. 6.48ms from Madrid, ES
216.74.143.117 AS3561 CenturyLink Communications, LLC 5.32ms from New York City, US
178.170.37.5 AS21409 Ikoula Net SAS 0.76ms from Reims, FR
198.189.195.53 AS2152 CENIC 3.46ms from San Jose, US
210.130.0.5 AS2497 Internet Initiative Japan Inc. 0.17ms from San Jose, US
189.237.74.245 AS8151 UNINET 11.83ms from Tucson, US
188.60.102.165 AS3303 Swisscom (Switzerland) Ltd 2.41ms from Zuerich, CH
52.191.87.165 AS8075 Microsoft Corporation 0.59ms from Ashburn, US
66.44.215.165 AS25853 Ellijay Telephone Company 2.20ms from Atlanta, US
162.231.28.69 AS7018 AT&T Enterprises, LLC 4.01ms from Atlanta, US
60.0.8.37 AS4837 CHINA UNICOM China169 Backbone 8.47ms from Beijing, CN
107.12.142.149 AS11426 Charter Communications Inc 16.68ms from Charlotte, US
38.124.95.53 AS36498 Access One Inc. 0.52ms from Chicago, US
104.231.178.197 AS10796 Charter Communications Inc 8.19ms from Columbus, US
176.68.72.149 AS1257 Tele2 Sverige AB 1.42ms from Copenhagen, DK
203.101.82.69 AS9498 BHARTI Airtel Ltd. 0.88ms from Delhi, IN

Traceroute

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

$
traceroute -a -n -q1 -f4 198.21.4.228
traceroute to 198.21.4.228 (198.21.4.228): 64 hops max, 52 byte packets
4 [AS3356] 4.34.66.142 7.741 ms
5 *
6 [AS11377] 198.21.4.228 7.578 ms
Measurement taken from IPinfo ProbeNet in Monticello, US
On

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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