Home ASN LookupAS16246

AS16246 AS16246 O2 Czech Republic, a.s.

🇨🇿

Org handle: ORG-STaN1-RIPE

NEJ.cz s.r.o

RIPE NCCallocated

Announced Prefixes (BGP)

15total

13 IPv42 IPv6

IPv4 Addresses

Allocated (RIR)133,120

Announced (BGP)133,120

IPv6 Addresses

Allocated (RIR)7.1×10²⁹

Announced (BGP)7.1×10²⁹

Prefix Limit (IPv4)

200

Prefix Limit (IPv6)

Country

🇨🇿 CZ

RIR

RIPE NCC

Status

allocated

Allocated

2001-02-07

Routing hygiene

Score 10/100 · Low risk

RPKI ROA coverage

100%

no RPKI invalid prefixes

IRR route objects

100%

no origin mismatches

Hijack signals

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

Upstreams

diversity 0/100

Only one upstream seen in the AS paths of its routes

Based on 15 announced prefixes, updated daily (2026-10-22). How the score works · RPKI explained

Announced Prefixes

(BGP)15

Prefix	RPKI	IRR	Last Seen
77.87.232.0/21	Valid	RIPE	2026-10-26
78.108.152.0/21	Valid	RIPE	2026-10-26
82.150.160.0/19	Valid	RIPE	2026-10-26
86.63.192.0/19	Valid	RIPE	2026-10-26
91.197.116.0/22	Valid	RIPE	2026-10-26
92.240.160.0/19	Valid	RIPE	2026-10-26
94.74.192.0/18	Valid	RIPE	2026-10-26
95.143.128.0/20	Valid	RIPE	2026-10-26
176.98.96.0/20	Valid	RIPE	2026-10-26
178.17.96.0/20	Valid	RIPE	2026-10-26

1-10 of 15

1 / 2

Allocated Prefixes

(RIR)15

Prefix	Country	RIR	Status
77.87.232.0/21	🇨🇿 CZ	RIPENCC	assigned
78.108.152.0/21	🇨🇿 CZ	RIPENCC	allocated
82.150.160.0/19	🇨🇿 CZ	RIPENCC	allocated
86.63.192.0/19	🇨🇿 CZ	RIPENCC	allocated
91.197.116.0/22	🇨🇿 CZ	RIPENCC	assigned
92.240.160.0/19	🇨🇿 CZ	RIPENCC	allocated
94.74.192.0/18	🇨🇿 CZ	RIPENCC	allocated
95.143.128.0/20	🇨🇿 CZ	RIPENCC	allocated
176.98.96.0/20	🇨🇿 CZ	RIPENCC	allocated
178.17.96.0/20	🇨🇿 CZ	RIPENCC	allocated

1-10 of 15

1 / 2

All 15 announced prefixes of AS16246 →

Downstream Customers(2)

ASN	Name
AS62178	🇨🇿Master_IT_Technologies MASTER IT Technologies, a.s.
AS207015	🇨🇿POSITION Position s.r.o.

BGP Neighbours

(seen in AS paths)

Upstreams (1)

Networks AS16246 hands its own prefixes to: transit providers, or peers at an exchange.

AS5610O2 CZECH REPUBLIC O2 Czech Republic, A.S15

Downstreams (12)

Networks whose own prefixes AS16246 passes on: usually its customers.

AS12570ITSELF O2 Czech Republic, A.S13
AS62178Master IT Technologies MASTER IT Technologies, A.S13
AS41046NEJTV O2 Czech Republic, A.S10
AS31246NETBOX O2 Czech Republic, A.S7
AS29321CentroNetAS O2 Czech Republic, A.S6
AS212315FTCZ NET Frantisek Toman4
AS44070MCnet O2 Czech Republic, A.S3
AS49767INTERNETPB O2 Czech Republic, A.S3
AS197197M NET CETIN A.S2
AS202657Hnojnik Pavel Jochim2
AS47681RIOMEDIA O2 Czech Republic, A.S1
AS207015POSITION S.R.O1

Transfer History

Registry transfers of AS16246 between organisations.

AS16246M&A · 2024-06-20
Nej.cz s.r.o.
RIPE NCC
→
O2 Czech Republic, a.s.
RIPE NCC
AS16246M&A · 2019-02-06
RIO Media a.s.
RIPE NCC
→
Nej.cz s.r.o.
RIPE NCC

Date	Resource	From	To	Type
2024-06-20	AS16246	Nej.cz s.r.o. RIPE NCC	O2 Czech Republic, a.s. RIPE NCC	M&A
2019-02-06	AS16246	RIO Media a.s. RIPE NCC	Nej.cz s.r.o. RIPE NCC	M&A

ASPA

No ASPA0 upstreams, 2 downstreams

Listed as Upstream Provider by

2 ASNs

View full ASPA details →

Abuse Contact

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/16246

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

curl -s "https://api.ipctl.io/v1/asn/16246" | jq