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:        network-technical@udel.edu
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:      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

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
128.53.0.0/16 AS2514 NTT PC Communications,Inc. 65,536
128.3.0.0/16 AS16 Lawrence Berkeley National Laboratory 65,536
128.170.0.0/16 AS243 L3Harris Technologies, Inc. 65,536
128.28.0.0/16 AS2514 NTT PC Communications,Inc. 65,536
128.143.0.0/16 AS225 University of Virginia 65,536
128.147.0.0/16 AS122 UPMC 65,536
128.34.0.0/16 AS22 Navy Network Information Center (NNIC) 65,536
128.239.0.0/16 AS11975 The College of William and Mary 65,536
128.100.0.0/16 AS239 University of Toronto 65,536
128.93.0.0/16 AS2200 Institut National de Recherche en Informatique et Automatique 65,536
128.82.0.0/16 AS1201 Old Dominion University 65,536
128.101.0.0/16 AS217 University of Minnesota 65,536
128.39.0.0/16 AS224 UNINETT backbone network 65,536
128.98.0.0/16 AS24775 QinetiQ TIM 65,536
128.49.0.0/16 AS22 Navy Network Information Center (NNIC) 65,536
128.230.0.0/16 AS11872 Syracuse University 65,536
128.111.0.0/16 AS131 University of California, Santa Barbara 65,536
128.173.0.0/16 AS1312 Virginia Polytechnic Institute and State Univ. 65,536
128.13.0.0/16 AS1341 RTX Corporation 65,536
128.164.0.0/16 AS11039 The George Washington University 65,536
128.163.0.0/16 AS23162 University of Kentucky 65,536
128.250.0.0/16 AS10148 The University of Melbourne 65,536
128.246.0.0/16 AS209781 BASF Digital Solutions GmbH 65,536
128.17.0.0/16 AS14340 Salesforce.com, Inc. 65,536
128.245.0.0/16 AS14340 Salesforce.com, Inc. 65,536
128.182.0.0/16 AS1206 Pittsburgh Supercomputing Center 65,536
128.138.0.0/16 AS104 University of Colorado 65,536
128.182.0.0/16 AS1207 Pittsburgh Supercomputing Center 65,536
128.146.0.0/16 AS159 Ohio State University 65,536
128.32.0.0/16 AS25 University of California at Berkeley 65,536
128.135.0.0/16 AS160 The University of Chicago 65,536
128.107.0.0/16 AS109 CISCO SYSTEMS, INC. 65,536
128.150.0.0/16 AS102 U.S. National Science Foundation 65,536
128.63.0.0/16 AS13 Headquarters, USAISC 65,536
128.11.0.0/16 AS16509 Amazon.com, Inc. 65,536
128.125.0.0/16 AS16509 Amazon Technologies Inc. 65,536
128.167.0.0/16 AS16509 Amazon.com, Inc. 65,536
128.181.0.0/16 AS16509 Amazon Technologies Inc. 65,536
128.188.0.0/16 AS16509 Amazon Technologies Inc. 65,536
128.21.0.0/16 AS16509 Amazon.com, Inc. 65,536
128.212.0.0/16 AS16509 Amazon.com, Inc. 65,536
128.81.0.0/16 AS16509 Amazon.com, Inc. 65,536
128.136.0.0/16 AS13649 Flexential Corp. 65,536
128.122.0.0/16 AS12 New York University 65,536
128.233.0.0/16 AS22950 University of Saskatchewan 65,536
128.59.0.0/16 AS14 Columbia University 65,536
128.33.0.0/16 AS11488 RTX BBN Technologies, 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
128.4.31.86 darptolus.com 1
128.4.31.87 sensifylab.org 1
128.4.20.226 huoenter.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
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
128.4.41.4 AS2 University of Delaware 4.71ms from Reston, US
128.4.33.2 AS2 University of Delaware 4.41ms 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
70.171.15.192 AS22773 Cox Communications Inc. 14.18ms from Atlanta, US
2.205.103.128 AS3209 Vodafone GmbH 4.67ms from Berlin, DE
52.13.228.240 AS16509 Amazon.com, Inc. 0.19ms from Boardman, US
186.114.127.16 AS3816 COLOMBIA TELECOMUNICACIONES S.A. ESP BIC 6.19ms from Bogota, CO
119.246.176.192 AS9269 Hong Kong Broadband Network Ltd. 1.09ms from Hong Kong, HK
185.214.180.64 AS205545 JIWA Holdings Ltd 0.85ms from London, GB
90.161.254.48 AS12479 Orange Espagne SA 1.75ms from Madrid, ES
185.18.82.208 AS30781 Free Pro SAS 0.50ms from Marseille, FR
92.161.80.160 AS3215 Orange S.A. 7.48ms from Marseille, FR
88.169.137.144 AS12322 Free SAS 8.11ms from Paris, FR
191.187.204.96 AS28573 Claro NXT Telecomunicacoes Ltda 7.95ms from Porto Alegre, BR
116.131.209.32 AS4837 CHINA UNICOM China169 Backbone 8.29ms from Tianjin, CN
14.9.97.128 AS2516 KDDI CORPORATION 10.05ms from Tokyo, JP
178.228.74.208 AS31615 Odido Netherlands B.V. 10.58ms from Amsterdam, NL
73.187.93.0 AS7922 Comcast Cable Communications, LLC 18.65ms from Ashburn, US
41.104.172.176 AS36947 Telecom Algeria 17.69ms from Barcelona, ES
113.205.216.224 AS4837 CHINA UNICOM China169 Backbone 1.46ms from Chongqing, CN
103.178.67.0 AS134732 Dot Internet 0.48ms from Dhaka, BD
27.155.167.144 AS4134 CHINANET-BACKBONE 8.32ms from Fuzhou, CN
222.85.247.64 AS4134 CHINANET-BACKBONE 1.45ms from Guiyang, CN
154.62.161.96 AS174 Cogent Communications, LLC 4.84ms from London, GB
80.18.190.240 AS3269 Telecom Italia S.p.A. 2.03ms from Milan, IT
34.73.181.0 AS396982 Google LLC 0.13ms from Moncks Corner, US
138.219.186.0 AS267220 AC INTERNET E SERVIÇOS LTDA ME 6.22ms from Muriae, BR
14.13.245.96 AS2516 KDDI CORPORATION 9.77ms from Osaka, JP

Traceroute

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

$
traceroute -a -n -q1 -m7 128.4.136.13
traceroute to 128.4.136.13 (128.4.136.13): 7 hops max, 52 byte packets
1 [AS198584] 93.95.115.1 7.551 ms
2 [] 194.62.6.4 0.915 ms
3 *
5 *
6 *
7 *
Measurement taken from IPinfo ProbeNet in Amsterdam, NL
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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