205.172.133.0/24

AS23494 · Blue Cross Blue Shield of Illinois or Blue Cross Blue Shield of Texas

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Summary

Country	United States
Domain	hcsc.net
ASN	AS23494
Registry	ARIN
ID	BCBSILLINOIS

WHOIS Details

NetHandle:      NET-205-172-132-0-1
OrgID:          BBI
Parent:         NET-205-0-0-0-0
NetName:        BCBSILLINOIS
NetRange:       205.172.132.0 - 205.172.135.255
NetType:        allocation
RegDate:        1995-04-12
Updated:        2021-12-14
TechHandle:     MSA111-ARIN
AbuseHandle:    MSA111-ARIN
Source:         ARIN


OrgID:          BBI
OrgName:        BlueCross BlueShield of Illinois
CanAllocate:    
Street:         300 East Randolph
City:           Chicago
State/Prov:     IL
Country:        US
PostalCode:     60604-5655
RegDate:        1995-04-12
Updated:        2024-05-16
OrgAdminHandle: BARRK5-ARIN
OrgTechHandle:  MSA111-ARIN
OrgAbuseHandle: MSA111-ARIN
Source:         ARIN


POCHandle:      BARRK5-ARIN
IsRole:         N
LastName:       Barr
FirstName:      Kevin
Street:         300 E. Randolph Street
City:           Chicago
State/Prov:     IL
Country:        US
PostalCode:     60601
RegDate:        2024-05-16
Updated:        2025-05-16
OfficePhone:    +1-972-766-4412
MobilePhone:    +1-214-862-5353
Mailbox:        [email protected]
Source:         ARIN


POCHandle:      MSA111-ARIN
IsRole:         N
LastName:       Sanner
FirstName:      Michael
Street:         300 East Randolph
City:           Chicago
State/Prov:     IL
Country:        US
PostalCode:     60601-5655
RegDate:        2006-09-06
Updated:        2024-05-16
OfficePhone:    +1-972-766-3576
MobilePhone:    +1-214-354-8112
Mailbox:        [email protected]
Mailbox:        [email protected]
Source:         ARIN

Nearby Ranges

BGP prefixes that overlap with 205.172.0.0/16

Range	ASN	Company	Num of IPs
205.172.120.0/21	AS26413	IP4B Inc.	2,048
205.172.176.0/22	AS16509	Amazon.com, Inc.	1,024
205.172.24.0/22	AS174	Hennigan & Mercer	1,024
205.172.168.0/22	AS1929	University of Massachusetts - AMHERST	1,024
205.172.12.0/22	AS32509	Sedgwick County Information Services	1,024
205.172.0.0/22	AS40300	DR Fortress, LLC	1,024
205.172.16.0/22	AS6534	Charter Communications Inc	1,024
205.172.164.0/22	AS88	McCarter Theatre Company	1,024
205.172.192.0/22	AS1436	Jersey Shore Medical Center Inc.	1,024
205.172.236.0/22	AS8103	Hillsborough County Public Health Unit	1,024
205.172.43.0/24	AS7312	FDM4 International Inc.	256

Hosted domains

There are no domains currently hosted on this ASN.

Hosted domains API

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Useful for Cybersecurity

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Pingable IPs

No IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

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
85.121.126.72	AS9009 M247 Europe SRL	`1.33ms` from Amsterdam, NL
44.242.188.200	AS16509 Amazon.com, Inc.	`0.50ms` from Boardman, US
122.140.117.200	AS4837 CHINA UNICOM China169 Backbone	`8.31ms` from Changchun, CN
172.205.76.56	AS8075 Microsoft Corporation	`0.19ms` from Dublin, IE
62.159.148.40	AS3320 Deutsche Telekom AG	`1.36ms` from Frankfurt am Main, DE
109.228.104.168	AS8585 Crnogorski Telekom a.d.Podgorica	`14.96ms` from Ljubljana, SI
68.167.79.120	AS9009 M247 Europe SRL	`0.10ms` from Paris, FR
50.53.161.120	AS20055 Wholesail networks LLC	`2.98ms` from Portland, US
183.105.170.216	AS4766 Korea Telecom	`6.28ms` from Seoul, KR
175.240.55.24	AS4766 Korea Telecom	`1.68ms` from Seoul, KR
34.222.121.232	AS16509 Amazon.com, Inc.	`0.13ms` from Boardman, US
3.12.224.120	AS16509 Amazon.com, Inc.	`0.17ms` from Columbus, US
158.252.40.104	AS16509 Amazon.com, Inc.	`0.12ms` from Dubai, AE
5.78.147.24	AS212317 Hetzner Online GmbH	`0.16ms` from Hillsboro, US
171.250.107.216	AS7552 Viettel Group	`1.93ms` from Ho Chi Minh City, VN
130.159.28.72	AS786 Jisc Services Limited	`11.62ms` from London, GB
185.197.234.88	AS206054 TowerStream, LLC	`6.39ms` from Moscow, RU
108.46.201.104	AS701 Verizon Business	`2.12ms` from New York City, US
219.107.11.72	AS2518 BIGLOBE Inc.	`10.72ms` from Osaka, JP
92.61.171.200	AS216273 M6 Distribution Digital SAS	`0.80ms` from Paris, FR
174.27.119.24	AS209 CenturyLink Communications, LLC	`15.35ms` from Portland, US
50.232.196.216	AS33651 Comcast Cable Communications, LLC	`1.76ms` from San Jose, US
116.126.238.24	AS9318 SK Broadband Co Ltd	`5.29ms` from Seoul, KR
115.40.94.200	AS9845 LG HelloVision Corp.	`7.60ms` from Seoul, KR
203.206.235.120	AS4739 Internode Pty Ltd	`1.23ms` from Sydney, AU

Traceroute

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

traceroute -a -n -q1 -m5 205.172.133.180

traceroute to 205.172.133.180 (205.172.133.180): 5 hops max, 52 byte packets

1 [AS202422] 202.78.167.1 0.142 ms

2 [AS199524] 92.223.63.81 0.139 ms

3 *

4 *

5 *

Measurement taken from

IPinfo ProbeNet in Tokyo, JP

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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