207.71.136.0/23

AS21896 · Alliant Energy

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Summary

Country	United States
Domain	alliantenergy.com
ASN	AS21896
Registry	ARIN
ID	NETBLK-ALI2

WHOIS Details

NetHandle:      NET-207-71-128-0-1
OrgID:          ALLIA-101
Parent:         NET-207-0-0-0-0
NetName:        NETBLK-ALI2
NetRange:       207.71.128.0 - 207.71.159.255
NetType:        allocation
RegDate:        1996-03-20
Updated:        2021-12-14
Source:         ARIN


OrgID:          ALLIA-101
OrgName:        Alliant Energy
CanAllocate:    
Street:         4902 North Biltmore Lane
City:           Madison
State/Prov:     WI
Country:        US
PostalCode:     53707-1007
Comment:        Standard NOC hours are 7am to 5pm CST
RegDate:        2008-12-30
Updated:        2020-12-08
OrgAdminHandle: DNA51-ARIN
OrgTechHandle:  DNA51-ARIN
OrgAbuseHandle: DNA51-ARIN
Source:         ARIN


POCHandle:      DNA51-ARIN
IsRole:         Y
LastName:       Data Networks Admin
FirstName:      
Street:         4902 North Biltmore Lane
City:           Madison
State/Prov:     WI
Country:        US
PostalCode:     53718
RegDate:        2008-12-29
Updated:        2025-02-14
OfficePhone:    +1-608-458-4357
Mailbox:        DL_IT_Data_Network-ALI@alliantenergy.com
Mailbox:        dl_its_telecom_networks@alliantenergy.com
Source:         ARIN

Nearby Ranges

BGP prefixes that overlap with 207.71.0.0/16

Range	ASN	Company	Num of IPs
207.71.0.0/18	AS3356	Level 3 Parent, LLC	16,384
207.71.0.0/18	AS3549	Level 3 Parent, LLC	16,384
207.71.192.0/18	AS4927	Aseva LLC	16,384
207.71.64.0/18	AS2914	NTT America, Inc.	16,384
207.71.20.0/22	AS3356	World Net	1,024
207.71.12.0/23	AS11667	Westel, Inc.	512
207.71.14.0/23	AS26995	TeleNetwork	512
207.71.54.0/24	AS26831	Cameron Communications, LLC	256
207.71.32.0/24	AS13993	Motive	256
207.71.40.0/24	AS54050	Government Personnel Mutual Life Insurance	256

Hosted domains

There are no domains currently hosted on this ASN.

Hosted domains API

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Pingable IPs

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

IP Address	ASN	Details
207.71.136.253	AS21896 Alliant Energy	`1.97ms` from Monticello, 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
20.232.167.183	AS8075 Microsoft Corporation	`0.42ms` from Ashburn, US
74.235.221.87	AS8075 Microsoft Corporation	`0.39ms` from Ashburn, US
173.186.52.231	AS7029 Windstream Communications LLC	`4.62ms` from Atlanta, US
101.241.72.183	AS17429 BEIJING GEHUA CATV NETWORK CO.LTD	`9.28ms` from Beijing, CN
20.85.26.71	AS8075 Microsoft Corporation	`0.28ms` from Boydton, US
174.29.177.167	AS209 CenturyLink Communications, LLC	`2.08ms` from Denver, US
204.220.162.151	AS200069 MAILJET SAS	`7.34ms` from Frankfurt am Main, DE
81.140.47.39	AS2856 British Telecommunications PLC	`6.14ms` from London, GB
172.248.29.103	AS20001 Charter Communications Inc	`6.13ms` from Los Angeles, US
79.157.243.183	AS3352 TELEFONICA DE ESPANA S.A.U.	`10.42ms` from Madrid, ES
217.251.219.135	AS3320 Deutsche Telekom AG	`6.79ms` from Nuernberg, DE
172.234.175.231	AS63949 Akamai Connected Cloud	`0.70ms` from Paris, FR
211.220.43.103	AS4766 Korea Telecom	`6.12ms` from Seoul, KR
59.22.250.71	AS4766 Korea Telecom	`7.33ms` from Seoul, KR
123.215.132.7	AS9318 SK Broadband Co Ltd	`6.90ms` from Seoul, KR
34.116.94.23	AS396982 Google LLC	`0.11ms` from Sydney, AU
27.89.54.247	AS2516 KDDI CORPORATION	`2.54ms` from Tokyo, JP
86.94.158.199	AS1136 KPN B.V.	`1.29ms` from Amsterdam, NL
74.65.30.103	AS11351 Charter Communications Inc	`18.39ms` from Chicago, US
47.121.205.119	AS37963 Hangzhou Alibaba Advertising Co.,Ltd.	`0.47ms` from Heyuan, CN
4.226.6.71	AS8075 Microsoft Corporation	`0.21ms` from Kloten, CH
42.7.77.71	AS4837 CHINA UNICOM China169 Backbone	`11.16ms` from Liaoyang, CN
2.125.176.119	AS5607 Sky UK Limited	`5.66ms` from London, GB
47.249.15.151	AS33363 Charter Communications, Inc	`9.69ms` from Los Angeles, US
222.92.79.119	AS4134 CHINANET-BACKBONE	`4.01ms` from Nanjing, CN

Traceroute

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

traceroute -a -n -q1 -f3 207.71.136.254

traceroute to 207.71.136.254 (207.71.136.254): 64 hops max, 52 byte packets

3 [AS3356] 4.69.214.154 98.804 ms

4 [AS3356] 4.39.191.78 99.334 ms

5 [AS21896] 207.71.136.254 99.587 ms

Measurement taken from

IPinfo ProbeNet in Edinburgh, GB

On December 28th 2025

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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