Home ASN LookupAS39521

AS39521 TNGNET TNGNET B.V.

🇳🇱

Org handle: ORG-TB92-RIPE

RIPE NCCallocated

Announced Prefixes (BGP)

53total

48 IPv45 IPv6

IPv4 Addresses

Allocated (RIR)7,936

Announced (BGP)22,272

IPv6 Addresses

Allocated (RIR)7.9×10²⁹

Announced (BGP)7.9×10²⁹

Prefix Limit (IPv4)

100

Prefix Limit (IPv6)

Country

🇳🇱 NL

RIR

RIPE NCC

Status

allocated

Allocated

2015-03-09

Routing hygiene

Score 16/100 · Low risk

RPKI ROA coverage

90.4%

5 prefixes RPKI invalid

IRR route objects

90.4%

4 prefixes registered for another origin

Hijack signals

0 announced against others' ROAs, 0 own announced by others

Upstreams

diversity 37/100

10% of announced prefixes (5 of 52) have no valid ROA, 5 of them RPKI invalid

Based on 52 announced prefixes, updated daily (2026-10-24). How the score works · RPKI explained

Announced Prefixes

(BGP)53

Prefix	RPKI	IRR	Last Seen
5.22.204.0/22MOAS	Valid	RIPE	2026-10-26
45.10.16.0/24	Valid	RIPE	2026-10-26
45.10.17.0/24	Valid	RIPE	2026-10-26
45.10.18.0/24	Valid	RIPE	2026-10-26
45.88.5.0/24	Valid	RIPE	2026-10-26
45.88.6.0/24	Valid	RIPE	2026-10-26
45.88.7.0/24	Valid	RIPE	2026-10-26
45.95.40.0/24	Valid	RIPE	2026-10-26
45.95.41.0/24	Valid	RIPE	2026-10-26
45.130.100.0/22	Valid	RIPE	2026-10-26

1-10 of 53

1 / 6

Allocated Prefixes

(RIR)26

Prefix	Country	RIR	Status
45.88.5.0/24	🇳🇱 NL	RIPENCC	allocated
45.88.7.0/24	🇳🇱 NL	RIPE	assigned
45.95.40.0/24	🇳🇱 NL	RIPE	assigned
45.95.41.0/24	🇳🇱 NL	RIPE	assigned
45.130.100.0/22	🇳🇱 NL	RIPENCC	allocated
82.21.112.0/24	🇭🇰 HK	RIPE	assigned
82.23.188.0/24	🇺🇸 US	RIPE	assigned
82.23.191.0/24	🇭🇰 HK	RIPE	assigned
82.47.201.0/24	🇪🇺 EU	RIPE	assigned
82.47.205.0/24	🇪🇺 EU	RIPE	assigned

1-10 of 26

1 / 3

All 53 announced prefixes of AS39521 →

Downstream Customers(1)

ASN	Name
AS205941	🇷🇴LSG Lungu Stefan Gabriel

BGP Neighbours

(seen in AS paths)

Upstreams (6)

Networks AS39521 hands its own prefixes to: transit providers, or peers at an exchange.

AS6939Hurricane Electric41
AS174Cogent Communications5
AS6830LibertyGlobal Liberty Global Europe Holding B.V2
AS61138ZAPPIE HOST Zappie Host2
AS5511Opentransit Orange S.A1
AS6206NETROUTING B.V1

Downstreams (7)

Networks whose own prefixes AS39521 passes on: usually its customers.

AS213784TNGNET B.V47
AS47690TNGNET B.V46
AS60117HS Host Sailor37
AS61060XRCservices NXTcom Nederland BV11
AS31800DALnet2
AS207778Linservers Jacobus Huijbrechts2
AS24381BGP.Exchange1

ASPA

No ASPA0 upstreams, 1 downstream

Listed as Upstream Provider by

1 ASN

View full ASPA details →

Abuse Contact

+31205354444

External Links

RIPE Whois RIPEstat

Learn more

What is an ASN?Autonomous systems, ASN ranges and how they are assigned
RPKI and route origin validationWhat the RPKI badges on the prefix list mean
How to run an ASPA checkVerify the upstream providers listed above
IPv4 transfers in the RIPE NCC regionMonthly volume and the latest registry transfers
ASN data in AI agents and SIEMMCP server and API integrations

API

Open

GEThttps://api.ipctl.io/v1/asn/39521

Returns ASN details, announced prefixes, and BGP routing data.

curl -s "https://api.ipctl.io/v1/asn/39521" | jq