208.21.0.0/16 IP Address Range

Explore geolocation information for IP ranges, including the start and end addresses and their corresponding CIDR or prefix. See details about the networks and locations associated with each address. Understand how these IPs are organized and distributed across different networks.

IPv4 range intelligence

208.21.0.0/16

Anycast
0 (0.00%)
Responding /24s
1 (of 256)
CDN
0 (0.00%)
RPKI valid
0.0%

Summary

208.21.0.0/16 holds 65,536 addresses spread across 2 countries and 6 autonomous systems, announced through 9 BGP prefixes. The largest single share sits in United States at 87.50%. It is administered by ARIN, with registrations dating from 1996-03-13. 1 address answered ping.

Networks
6
BGP prefixes
9
Countries
2
Pingable IPs
1
Companies
6
Child ranges
256

IP Address Coverage

Mapped
65,536
Unmapped
0
Total addresses
65,536

Security

24,576 flagged addresses — 37.50% of 65,536 total.

Anonymous
00.00%
Known attacker
00.00%
Spam
00.00%
Bot
00.00%
Cloud provider
24,57637.50%
VPN
00.00%
Residential proxy
00.00%
Proxy
00.00%

Coverage

Address Space

100.0%

of the range is
announced in BGP

Routed
65,536 100.00%

Regional registry

  • ARIN100.00%

Routing security (RPKI)

0.0%

of announced space
has a valid route origin

No ROA
65,536 100.00%

/16 range map

Explore the most reachable child ranges.

Autonomous systems

showing 6 of 6

ASNOperatorIPv4 routesIPv6 routesAddresses hereShare
AS174
USCogent Communications, LLC
 4,129 534 40,192
61.33%
AS3491
HKPCCW Global HK Limited
 525 44 16,128
24.61%
AS6762
ITTelecom Italia Sparkle S.p.A.
 312 13 8,192
12.50%
AS11280
USSNAPPYDSL.NET
 7 0 512
0.78%
AS22773
USCox Communications, Inc.
 8,610 2,373 256
0.39%
AS54174
USBlueCross BlueShield of Tennessee
 3 0 256
0.39%

Showing 6 of 6

All IP Ranges

showing 10 of 256

PrefixFirst IPLast IPNo. of IPsPingableAnycastBogon / special‑useCategory
208.21.0.0/24 208.21.0.0208.21.0.255256 0 0 0 No ping response
208.21.1.0/24 208.21.1.0208.21.1.255256 0 0 0 No ping response
208.21.2.0/24 208.21.2.0208.21.2.255256 0 0 0 No ping response
208.21.3.0/24 208.21.3.0208.21.3.255256 0 0 0 No ping response
208.21.4.0/24 208.21.4.0208.21.4.255256 0 0 0 No ping response
208.21.5.0/24 208.21.5.0208.21.5.255256 0 0 0 No ping response
208.21.6.0/24 208.21.6.0208.21.6.255256 0 0 0 No ping response
208.21.7.0/24 208.21.7.0208.21.7.255256 0 0 0 No ping response
208.21.8.0/24 208.21.8.0208.21.8.255256 0 0 0 No ping response
208.21.9.0/24 208.21.9.0208.21.9.255256 0 0 0 No ping response