ResearchRouting table, RPKI, IRR & looking glass

AS23528 Bird.com Inc.

AS23528 (SPARKPOST) is registered to Bird.com Inc. in US, through ARIN. It originates 81 prefixes in the global routing table.

81
IPv4 prefixes
0
IPv6 prefixes
33,536
IPv4 addresses
3%
RPKI valid
Registration

Who holds AS23528

Names from RIPE NCC’s daily list of every allocated AS number. The ASN lookup fetches the full WHOIS record live.

AS number
AS23528
Handle
SPARKPOST
Organization
Bird.com Inc.
Country
US
Registry
ARIN
ASPA
None published
WHOIS recordARIN
#
# 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 1997-2026, American Registry for Internet Numbers, Ltd.
#


ASNumber:       23528
ASName:         SPARKPOST
ASHandle:       AS23528
RegDate:        2018-04-16
Updated:        2018-04-16
Ref:            https://rdap.arin.net/registry/autnum/23528


OrgName:        Bird.com Inc.
OrgId:          MS-820
Address:        4701 Sangamore Road suite 100N-139
City:           Bethesda
StateProv:      MD
PostalCode:     20816
Country:        US
RegDate:        2015-12-09
Updated:        2025-08-14
Ref:            https://rdap.arin.net/registry/entity/MS-820


OrgDNSHandle: PARMA32-ARIN
OrgDNSName:   Parman, Tyler 
OrgDNSPhone:  +1-415-578-5222 
OrgDNSEmail:  tyler.parman@bird.com
OrgDNSRef:    https://rdap.arin.net/registry/entity/PARMA32-ARIN

OrgTechHandle: PILLA10-ARIN
OrgTechName:   Pillai, Balasubramania 
OrgTechPhone:  +1-410-953-9519 
OrgTechEmail:  balu.pillai@bird.com
OrgTechRef:    https://rdap.arin.net/registry/entity/PILLA10-ARIN

OrgRoutingHandle: PARMA32-ARIN
OrgRoutingName:   Parman, Tyler 
OrgRoutingPhone:  +1-415-578-5222 
OrgRoutingEmail:  tyler.parman@bird.com
OrgRoutingRef:    https://rdap.arin.net/registry/entity/PARMA32-ARIN

OrgAbuseHandle: SEA25-ARIN
OrgAbuseName:   SparkPost Elite Abuse
OrgAbusePhone:  +1-410-872-4910 
OrgAbuseEmail:  abuse@sparkpostmail.com
OrgAbuseRef:    https://rdap.arin.net/registry/entity/SEA25-ARIN

OrgTechHandle: MATTR5-ARIN
OrgTechName:   Mattrat, Felix 
OrgTechPhone:  +3000000000 
OrgTechEmail:  felix@bird.com
OrgTechRef:    https://rdap.arin.net/registry/entity/MATTR5-ARIN

OrgNOCHandle: SEA25-ARIN
OrgNOCName:   SparkPost Elite Abuse
OrgNOCPhone:  +1-410-872-4910 
OrgNOCEmail:  abuse@sparkpostmail.com
OrgNOCRef:    https://rdap.arin.net/registry/entity/SEA25-ARIN

OrgTechHandle: PARMA32-ARIN
OrgTechName:   Parman, Tyler 
OrgTechPhone:  +1-415-578-5222 
OrgTechEmail:  tyler.parman@bird.com
OrgTechRef:    https://rdap.arin.net/registry/entity/PARMA32-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 1997-2026, American Registry for Internet Numbers, Ltd.
#
Routing

What AS23528 announces

Prefixes originated by AS23528 in the RouteViews table (refreshed every four hours), each checked against the RPKI (every ten minutes) and the IRR (daily).

IPv4 prefixes
81
IPv6 prefixes
0
IPv4 addresses
33,536 (131 /24s)
RPKI valid
3 3%
RPKI invalid
0
RPKI not found
78
ROAs naming AS23528
8
With an IRR route object
81 100%
Prefixes

Announced prefixes

Each opens its own page: who announces it, the paths our collectors see, its ROAs and route objects.

IPv4 (81)
91.206.59.0/24137.22.224.0/24137.22.225.0/24137.22.226.0/24137.22.227.0/24137.22.228.0/24137.22.229.0/24137.22.230.0/24137.22.231.0/24137.22.232.0/24137.22.233.0/24137.22.234.0/24137.22.235.0/24137.22.236.0/24137.22.237.0/24137.22.238.0/24137.22.239.0/24137.22.240.0/24137.22.241.0/24137.22.242.0/24137.22.243.0/24137.22.244.0/24137.22.247.0/24137.22.248.0/24137.22.249.0/24137.22.250.0/24147.160.155.0/24147.253.208.0/20147.253.220.0/23147.253.222.0/24156.70.2.0/23156.70.4.0/23156.70.12.0/23156.70.16.0/23156.70.22.0/23156.70.24.0/23156.70.34.0/23156.70.46.0/23156.70.52.0/23156.70.62.0/23156.70.72.0/24156.70.73.0/24156.70.76.0/23156.70.88.0/23156.70.116.0/23156.70.120.0/23156.70.150.0/23161.129.25.0/24161.129.27.0/24161.199.112.0/24162.247.166.0/24162.247.167.0/24168.203.32.0/23168.203.34.0/23168.203.36.0/23168.203.42.0/23168.203.46.0/23168.203.48.0/22168.203.52.0/24168.203.53.0/24192.133.16.0/24192.158.253.0/24192.174.80.0/20192.174.92.0/24192.174.94.0/24192.174.95.0/24194.28.204.0/23199.15.224.0/24199.15.225.0/24199.15.226.0/23216.24.61.0/24223.165.112.0/24223.165.114.0/24223.165.116.0/24223.165.117.0/24223.165.122.0/24223.165.123.0/24223.165.124.0/24223.165.125.0/24223.165.126.0/24223.165.127.0/24

RPKI valid   RPKI invalid   no ROA covers it

Neighbors

Who AS23528 is reached through

The AS just before AS23528 in the paths our looking glass collectors hold, for 60 of its prefixes. Usually a transit provider, sometimes a peer. The number is how many of those prefixes it was seen on.

AS174 COGENT-174 60AS6939 HURRICANE 43AS3257 GTT-BACKBONE 17
IRR

Routing registry objects

From the mirrored IRR databases (RADB, the five RIRs and more). Look it up live.

Sourceas-nameMaintained by
RADBSPARKPOSTMAINT-AS23528

Route objects with origin AS23528: RADB 81 · RIPE 2 · APNIC 1

as-sets that list AS23528 (4)
AS-23528AS-GTTCUSTAS-HURRICANEAS-TRANSROUTE-SPEC
Tools

Check AS23528 live

ASN lookup and WHOISRPKI validatorASPA validatorIRR lookup