1. All IP Ranges
  2. 128.0.0.0/8
  3. 128.4.0.0/16
  4. AS2  | 128.4.0.0/16

128.4.0.0/16

AS2  ·  University of Delaware

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Summary

Country United States
Domain udel.edu
ASN AS2
Registry ARIN
ID UDEL-DCN

WHOIS Details

NetHandle:      NET-128-4-0-0-1
OrgID:          UNIVER-19-Z
Parent:         NET-128-0-0-0-0
NetName:        UDEL-DCN
NetRange:       128.4.0.0 - 128.4.255.255
NetType:        allocation
RegDate:        1991-01-10
Updated:        2024-08-15
TechHandle:     DAVIS2708-ARIN
Source:         ARIN


OrgID:          UNIVER-19-Z
OrgName:        University of Delaware
CanAllocate:    
Street:         Information Technologies
Street:         192 South Chapel Street
City:           Newark
State/Prov:     DE
Country:        US
PostalCode:     19716
RegDate:        2008-03-18
Updated:        2024-08-15
OrgAdminHandle: DAVIS2708-ARIN
OrgTechHandle:  NSS13-ARIN
OrgAbuseHandle: UDELN-ARIN
OrgNOCHandle:   UDELN-ARIN
OrgRoutingHandle:   NSS13-ARIN
OrgDNSHandle:   UDELN-ARIN
Source:         ARIN


POCHandle:      NSS13-ARIN
IsRole:         Y
LastName:       Network and Systems Services
FirstName:      
Street:         192 South Chapel Street
City:           Newark
State/Prov:     DE
Country:        US
PostalCode:     19716
RegDate:        2010-06-15
Updated:        2025-06-27
OfficePhone:    +1-302-831-6000
Mailbox:        [email protected]
Mailbox:        [email protected]
Source:         ARIN


POCHandle:      UDELN-ARIN
IsRole:         Y
LastName:       UDel NOC
FirstName:      
Street:         Information Technologies
City:           Newark
State/Prov:     DE
Country:        US
PostalCode:     19716
RegDate:        2009-08-07
Updated:        2025-01-10
OfficePhone:    +1-302-831-6000
FaxPhone:       +1-302-831-3717
Mailbox:        [email protected]
Source:         ARIN


POCHandle:      DAVIS2708-ARIN
IsRole:         N
LastName:       DAvis
FirstName:      Michael
Street:         192 S. Chapel St
City:           Newark
State/Prov:     DE
Country:        US
PostalCode:     19716
RegDate:        2023-09-21
Updated:        2025-09-19
OfficePhone:    +1-302-831-6006
Mailbox:        [email protected]
Source:         ARIN

Nearby Ranges

BGP prefixes that overlap with 128.0.0.0/8

Range ASN Company Num of IPs
128.78.0.0/15 AS5410 Bouygues Telecom SA 131,072
128.178.0.0/15 AS559 Ecublens Camp Net 131,072
128.130.0.0/15 AS679 Technische Universitaet Wien 131,072
128.231.0.0/16 AS3527 National Institutes of Health 65,536
128.12.0.0/16 AS32 Stanford University 65,536
128.29.0.0/16 AS35 The MITRE Corporation 65,536
128.121.0.0/16 AS2914 NTT America, Inc. 65,536
128.53.0.0/16 AS2514 NTT PC Communications,Inc. 65,536
128.32.0.0/16 AS25 University of California at Berkeley 65,536
128.36.0.0/16 AS29 Yale University 65,536
128.189.0.0/16 AS271 BCNET 65,536
128.242.0.0/16 AS2914 NTT America, Inc. 65,536
128.170.0.0/16 AS243 L3Harris Technologies, Inc. 65,536
128.100.0.0/16 AS239 University of Toronto 65,536
128.3.0.0/16 AS16 Lawrence Berkeley National Laboratory 65,536
128.136.0.0/16 AS13649 Flexential Corp. 65,536
128.234.0.0/16 AS25019 Saudi Telecom Company JSC 65,536
128.167.0.0/16 AS16509 Amazon.com, Inc. 65,536
128.21.0.0/16 AS16509 Amazon.com, Inc. 65,536
128.81.0.0/16 AS16509 Amazon.com, Inc. 65,536
128.253.0.0/16 AS26 Cornell University 65,536
128.252.0.0/16 AS2552 Washington University 65,536
128.49.0.0/16 AS22 Navy Network Information Center (NNIC) 65,536
128.47.0.0/16 AS252 Headquarters, USAISC 65,536
128.34.0.0/16 AS22 Navy Network Information Center (NNIC) 65,536
128.241.0.0/16 AS2914 NTT America, Inc. 65,536
128.93.0.0/16 AS2200 Institut National de Recherche en Informatique et Automatique 65,536
128.143.0.0/16 AS225 University of Virginia 65,536
128.233.0.0/16 AS22950 University of Saskatchewan 65,536
128.163.0.0/16 AS23162 University of Kentucky 65,536
128.59.0.0/16 AS14 Columbia University 65,536
128.188.0.0/16 AS16509 Amazon Technologies Inc. 65,536
128.245.0.0/16 AS14340 Salesforce.com, Inc. 65,536
128.17.0.0/16 AS14340 Salesforce.com, Inc. 65,536
128.135.0.0/16 AS160 The University of Chicago 65,536
128.181.0.0/16 AS16509 Amazon Technologies Inc. 65,536
128.11.0.0/16 AS16509 Amazon.com, Inc. 65,536
128.125.0.0/16 AS16509 Amazon Technologies Inc. 65,536
128.250.0.0/16 AS10148 The University of Melbourne 65,536
128.150.0.0/16 AS102 U.S. National Science Foundation 65,536
128.138.0.0/16 AS104 University of Colorado 65,536
128.212.0.0/16 AS16509 Amazon.com, Inc. 65,536
128.186.0.0/16 AS2553 Florida State University 65,536
128.164.0.0/16 AS11039 The George Washington University 65,536
128.197.0.0/16 AS111 Boston University 65,536
128.230.0.0/16 AS11872 Syracuse University 65,536
128.239.0.0/16 AS11975 The College of William and Mary 65,536
128.149.0.0/16 AS127 National Aeronautics and Space Administration 65,536
128.98.0.0/16 AS24775 QinetiQ TIM 65,536
128.28.0.0/16 AS2514 NTT PC Communications,Inc. 65,536

Hosted domains

There are 12 domain names hosted across 5 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address Domain Domains on this IP
128.4.31.8 softmaterials.ai 8
128.4.31.222 civl.dev 1
128.4.20.226 huoenter.com 1
128.4.31.86 darptolus.com 1
128.4.31.87 sensifylab.org 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
Read more

Pingable IPs

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

IP Address ASN Details
128.4.41.1 AS2 University of Delaware 4.62ms from Reston, US
128.4.33.3 AS2 University of Delaware 4.38ms from Reston, 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
196.210.191.16 AS20011 Dimension Data 3.15ms from Cape Town, ZA
119.50.196.128 AS4837 CHINA UNICOM China169 Backbone 6.79ms from Changchun, CN
201.202.105.240 AS11830 Instituto Costarricense de Electricidad y Telecom. 1.63ms from Curridabat, CR
65.102.86.80 AS209 CenturyLink Communications, LLC 4.23ms from Denver, US
76.103.184.80 AS7922 Comcast Cable Communications, LLC 6.00ms from Fremont, US
221.230.225.192 AS4134 CHINANET-BACKBONE 6.99ms from Huai'an, CN
41.208.33.16 AS16637 MTN SA 2.02ms from Johannesburg, ZA
185.253.0.240 AS15626 GREEN FLOID LLC 0.33ms from Kyiv, UA
85.92.207.144 AS6908 Datahop - Six Degrees 0.42ms from London, GB
185.103.80.160 AS34758 Axera SpA 3.06ms from Milan, IT
97.90.225.16 AS20115 Charter Communications LLC 12.54ms from Minneapolis, US
134.161.224.224 AS22594 University of Northern Iowa 7.23ms from Minneapolis, US
117.204.8.144 AS9829 National Internet Backbone 16.61ms from Mumbai, IN
91.13.223.96 AS3320 Deutsche Telekom AG 6.50ms from Nuernberg, DE
111.248.241.208 AS3462 Data Communication Business Group 1.10ms from Taipei, TW
194.60.249.0 AS41082 Company Uraltranskom Ltd. 0.62ms from Yekaterinburg, RU
100.15.199.224 AS701 Verizon Business 1.87ms from Ashburn, US
125.27.134.32 AS23969 TOT Public Company Limited 2.30ms from Bangkok, TH
202.14.237.0 AS17964 Beijing Dian-Xin-Tong Network Technologies Co., Ltd. 3.86ms from Beijing, CN
44.225.244.240 AS16509 Amazon.com, Inc. 0.16ms from Boardman, US
143.0.171.144 AS28080 Interredes S.A. 16.87ms from Buenos Aires, AR
107.10.149.192 AS10796 Charter Communications Inc 11.21ms from Columbus, US
68.148.178.224 AS6327 Shaw Communications 5.17ms from Edmonton, CA
46.105.166.96 AS16276 OVH SAS 0.07ms from Gravelines, FR
20.208.0.0 AS8075 Microsoft Corporation 0.24ms from Kloten, CH

Traceroute

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

$
traceroute -a -n -q1 -m7 128.4.238.250
traceroute to 128.4.238.250 (128.4.238.250): 7 hops max, 52 byte packets
2 *
3 [] 199.109.107.165 85.728 ms
4 [] 199.109.107.186 91.857 ms
5 *
6 *
7 *
Measurement taken from IPinfo ProbeNet in Zuerich, CH
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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