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:      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:        noc@udel.edu
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:        davis@udel.edu
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:        network-technical@udel.edu
Mailbox:        noc@udel.edu
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
128.255.0.0/16 AS3676 University of Iowa 65,536
128.143.0.0/16 AS225 University of Virginia 65,536
128.192.0.0/16 AS36441 University of Georgia 65,536
128.55.0.0/16 AS2936 ESnet 65,536
128.183.0.0/16 AS270 National Aeronautics and Space Administration 65,536
128.206.0.0/16 AS26934 University of Missouri-Columbia 65,536
128.175.0.0/16 AS34 University of Delaware 65,536
128.102.0.0/16 AS270 National Aeronautics and Space Administration 65,536
128.189.0.0/16 AS271 BCNET 65,536
128.217.0.0/16 AS270 National Aeronautics and Space Administration 65,536
128.158.0.0/16 AS270 National Aeronautics and Space Administration 65,536
128.22.0.0/16 AS17511 OPTAGE Inc. 65,536
128.18.0.0/16 AS264 SRI International 65,536
128.12.0.0/16 AS32 Stanford University 65,536
128.228.0.0/16 AS31822 City University of New York 65,536
128.53.0.0/16 AS2514 NTT PC Communications,Inc. 65,536
128.47.0.0/16 AS252 Headquarters, USAISC 65,536
128.8.0.0/16 AS27 University of Maryland 65,536
128.87.0.0/16 AS158 Telefonaktiebolaget LM Ericsson 65,536
128.19.0.0/16 AS27064 DoD Network Information Center 65,536
128.37.0.0/16 AS27064 Headquarters, USAISC 65,536
128.214.0.0/16 AS1741 CSC - Tieteen tietotekniikan keskus Oy 65,536
128.159.0.0/16 AS270 National Aeronautics and Space Administration 65,536
128.3.0.0/16 AS16 Lawrence Berkeley National Laboratory 65,536
128.157.0.0/16 AS270 National Aeronautics and Space Administration 65,536
128.34.0.0/16 AS22 Navy Network Information Center (NNIC) 65,536
128.49.0.0/16 AS22 Navy Network Information Center (NNIC) 65,536
128.93.0.0/16 AS2200 Institut National de Recherche en Informatique et Automatique 65,536
128.39.0.0/16 AS224 UNINETT backbone network 65,536
128.231.0.0/16 AS3527 National Institutes of Health 65,536
128.27.0.0/16 AS17511 OPTAGE Inc. 65,536
128.28.0.0/16 AS2514 NTT PC Communications,Inc. 65,536
128.155.0.0/16 AS270 National Aeronautics and Space Administration 65,536
128.103.0.0/16 AS198949 Harvard University 65,536
128.135.0.0/16 AS160 The University of Chicago 65,536
128.233.0.0/16 AS22950 University of Saskatchewan 65,536
128.163.0.0/16 AS23162 University of Kentucky 65,536
128.151.0.0/16 AS20 University of Rochester 65,536
128.100.0.0/16 AS239 University of Toronto 65,536
128.170.0.0/16 AS243 L3Harris Technologies, Inc. 65,536
128.252.0.0/16 AS2552 Washington University 65,536
128.253.0.0/16 AS26 Cornell University 65,536
128.98.0.0/16 AS24775 QinetiQ TIM 65,536
128.186.0.0/16 AS2553 Florida State University 65,536
128.32.0.0/16 AS25 University of California at Berkeley 65,536
128.234.0.0/16 AS25019 Saudi Telecom Company JSC 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
128.4.31.87 sensifylab.org 1
128.4.20.226 huoenter.com 1
128.4.31.86 darptolus.com 1
128.4.31.222 civl.dev 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
52.17.220.144 AS16509 Amazon.com, Inc. 0.14ms from Dublin, IE
81.137.206.144 AS2856 British Telecommunications PLC 2.75ms from Erith, GB
45.5.130.128 AS266111 REDE SUPERNET 6.51ms from Fortaleza, BR
143.89.121.240 AS3363 Hong Kong University of Science and Technology 1.92ms from Hong Kong, HK
73.28.211.16 AS7922 Comcast Cable Communications, LLC 7.83ms from Miami, US
79.54.26.144 AS3269 Telecom Italia S.p.A. 8.50ms from Milan, IT
87.28.168.0 AS3269 Telecom Italia S.p.A. 0.62ms from Milan, IT
185.103.80.160 AS34758 Axera SpA 3.05ms from Milan, IT
182.59.218.64 AS17813 Mahanagar Telephone Nigam Limited 2.80ms from Mumbai, IN
218.230.232.48 AS4713 NTT DOCOMO BUSINESS,Inc. 3.02ms from Osaka, JP
74.65.7.192 AS11351 Charter Communications Inc 18.28ms from Secaucus, US
75.132.93.48 AS20115 Charter Communications LLC 5.38ms from St. Louis, US
106.105.115.192 AS18049 Taiwan Infrastructure Network Technologie 3.72ms from Taipei, TW
81.219.34.224 AS12741 Netia SA 7.85ms from Warsaw, PL
2.177.240.64 AS58224 Iran Telecommunication Company PJS 15.17ms from Yerevan, AM
48.194.99.112 AS8075 Microsoft Corporation 0.61ms from Ashburn, US
120.61.8.144 AS9829 National Internet Backbone 13.39ms from Bengaluru, IN
172.73.2.16 AS11426 Charter Communications Inc 4.02ms from Charlotte, US
70.59.15.224 AS209 CenturyLink Communications, LLC 2.04ms from Denver, US
189.177.86.96 AS8151 UNINET 0.98ms from Guadalajara, MX
115.156.126.96 AS4538 China Education and Research Network Center 15.83ms from Guangzhou, CN
154.49.169.16 AS199724 TeknoDC Bilisim Teknolojileri A.S. 2.05ms from Istanbul, TR
45.201.188.224 AS131178 EZECOM CO., LTD. 1.01ms from Phnom Penh, KH
185.162.93.208 AS41722 Miran Ltd. 0.28ms from Saint Petersburg, RU
1.192.139.96 AS4134 CHINANET-BACKBONE 7.42ms from Zhengzhou, CN

Traceroute

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

$
traceroute -a -n -q1 -m5 128.4.8.180
traceroute to 128.4.8.180 (128.4.8.180): 5 hops max, 52 byte packets
1 [AS15169] 142.251.52.186 247.849 ms
2 [] 199.109.102.9 228.865 ms
3 *
4 *
5 *
Measurement taken from IPinfo ProbeNet in Delhi, IN
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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