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› › I had no idea there were so many reserved IPv4 ranges
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I had no idea there were so many reserved IPv4 ranges

raindog308raindog308 Administrator, Veteran
in General

Everyone knows about 10.x, 172.16.x, 192.168.x, 169.254.x, and 127.x.

But how about 203.0.113.0/24?

192.0.2.0/24?

198.51.100.0/24?

192.18.0.0/15?

There's all sorts of little chunks of the IPv4 space that were reserved a million years ago for special testing and are still reserved.

For example, the 131K IPs in 192.18.0.0/15 have been reserved since March 1999 for "benchmarking methodology for network interconnect devices". Good thing, too, because I'm sure the debate about the proper frame size for token ring has raged continuously since then...

See Wikipedia for a full list.

Thanked by 1that_guy

Comments

  • yoursunnyyoursunny Member, IPv6 Advocate

    192.0.2.0/24 is for documentation use.
    My tutorial Enable IPv4 Access in EUserv IPv6-only VS2-free used some addresses in this subnet.

    I know there are three subnets but only remember and routinely use the first one.
    I look up the other two when I need more addresses than one /24 subnet in my tutorials.

  • RocksterRockster Member

    It seems a lot in our micro LEB world, but in reality it's like nothing. Potential releasing of few 100k or even million of addresses it's not any game changer globally and no one here would really benefit from that or get one single IP from this little barely worth to be mentioned pool.
    Any established local middle sized ISP have more addresses than that.

  • sotssots Member
    edited June 2022 
    ❯  whois 192.18.0.0

#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/resources/registry/whois/tou/
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
#
# Copyright 1997-2022, American Registry for Internet Numbers, Ltd.
#


NetRange:       192.18.0.0 - 192.18.194.255
CIDR:           192.18.192.0/23, 192.18.128.0/18, 192.18.0.0/17, 192.18.194.0/24
NetName:        ORACLE-BRM4
NetHandle:      NET-192-18-0-0-1
Parent:         NET192 (NET-192-0-0-0-0)
NetType:        Direct Allocation
OriginAS:       
Organization:   Oracle Corporation (ORACLE-4)
RegDate:        1985-09-09
Updated:        2016-10-10
Ref:            https://rdap.arin.net/registry/ip/192.18.0.0


OrgName:        Oracle Corporation
OrgId:          ORACLE-4
Address:        500 Oracle Parkway
Address:        Attn: Domain Administrator
City:           Redwood Shores
StateProv:      CA
PostalCode:     94065
Country:        US
RegDate:        1988-04-29
Updated:        2021-08-02
Ref:            https://rdap.arin.net/registry/entity/ORACLE-4


OrgAbuseHandle: NISAM-ARIN
OrgAbuseName:   Network Information Systems Abuse Management
OrgAbusePhone:  +1-650-506-2220 
OrgAbuseEmail:  [email protected]
OrgAbuseRef:    https://rdap.arin.net/registry/entity/NISAM-ARIN

OrgTechHandle: ORACL1-ARIN
OrgTechName:   ORACLE NIS
OrgTechPhone:  +1-650-506-2220 
OrgTechEmail:  [email protected]
OrgTechRef:    https://rdap.arin.net/registry/entity/ORACL1-ARIN

OrgRoutingHandle: ORACL2-ARIN
OrgRoutingName:   ORACLEROUTING
OrgRoutingPhone:  +1-800-392-2999 
OrgRoutingEmail:  [email protected]
OrgRoutingRef:    https://rdap.arin.net/registry/entity/ORACL2-ARIN


#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/resources/registry/whois/tou/
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
#
# Copyright 1997-2022, American Registry for Internet Numbers, Ltd.
#

    192.18.0.0/16 belongs to Oracle.
    192.19.0.0/16 belongs to Avago.

    Thanked by 1devp
  • devpdevp Member

    ipv6 is a win as transition is more prevalent after introduction to edge computing and connected devices.

  • sotssots Member

    Then, here is what you may want: https://blog.apnic.net/2022/05/31/cutting-down-on-ip-address-waste/

  • FranciscoFrancisco Top Host, Host Rep, Veteran

    @Rockster said:
    It seems a lot in our micro LEB world, but in reality it's like nothing. Potential releasing of few 100k or even million of addresses it's not any game changer globally and no one here would really benefit from that or get one single IP from this little barely worth to be mentioned pool.
    Any established local middle sized ISP have more addresses than that.

    Basically this. There is tons of large blocks come free from old corps. Amazon has bought most/all of it.

    Francisco

    Thanked by 2bulbasaur Rockster
  • kevindskevinds Member, LIR

    100.64.0.0/10 is one of the newest reserved blocks..

    169.254.0.0/16 was excessive even at the time it was assigned..

    The documentation blocks, would be nice if there was a couple more of them, and a couple different sizes.. Explaining scenarios, I frequently find there are not enough..

  • TimboJonesTimboJones Member

    @kevinds said:
    100.64.0.0/10 is one of the newest reserved blocks..

    169.254.0.0/16 was excessive even at the time it was assigned..

    The documentation blocks, would be nice if there was a couple more of them, and a couple different sizes.. Explaining scenarios, I frequently find there are not enough..

    It's to avoid collisions and based on statistics.

  • szymonpszymonp Member

    @sots said:

    ❯  whois 192.18.0.0

#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/resources/registry/whois/tou/
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
#
# Copyright 1997-2022, American Registry for Internet Numbers, Ltd.
#


NetRange:       192.18.0.0 - 192.18.194.255
CIDR:           192.18.192.0/23, 192.18.128.0/18, 192.18.0.0/17, 192.18.194.0/24
NetName:        ORACLE-BRM4
NetHandle:      NET-192-18-0-0-1
Parent:         NET192 (NET-192-0-0-0-0)
NetType:        Direct Allocation
OriginAS:       
Organization:   Oracle Corporation (ORACLE-4)
RegDate:        1985-09-09
Updated:        2016-10-10
Ref:            https://rdap.arin.net/registry/ip/192.18.0.0


OrgName:        Oracle Corporation
OrgId:          ORACLE-4
Address:        500 Oracle Parkway
Address:        Attn: Domain Administrator
City:           Redwood Shores
StateProv:      CA
PostalCode:     94065
Country:        US
RegDate:        1988-04-29
Updated:        2021-08-02
Ref:            https://rdap.arin.net/registry/entity/ORACLE-4


OrgAbuseHandle: NISAM-ARIN
OrgAbuseName:   Network Information Systems Abuse Management
OrgAbusePhone:  +1-650-506-2220 
OrgAbuseEmail:  [email protected]
OrgAbuseRef:    https://rdap.arin.net/registry/entity/NISAM-ARIN

OrgTechHandle: ORACL1-ARIN
OrgTechName:   ORACLE NIS
OrgTechPhone:  +1-650-506-2220 
OrgTechEmail:  [email protected]
OrgTechRef:    https://rdap.arin.net/registry/entity/ORACL1-ARIN

OrgRoutingHandle: ORACL2-ARIN
OrgRoutingName:   ORACLEROUTING
OrgRoutingPhone:  +1-800-392-2999 
OrgRoutingEmail:  [email protected]
OrgRoutingRef:    https://rdap.arin.net/registry/entity/ORACL2-ARIN


#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/resources/registry/whois/tou/
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
#
# Copyright 1997-2022, American Registry for Internet Numbers, Ltd.
#

    192.18.0.0/16 belongs to Oracle.
    192.19.0.0/16 belongs to Avago.

    I'm pretty sure it's even used by oracle cloud

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