Home Prefix Lookup173.205.128.0/17

173.205.128.0/17 - BGP Prefix

IPv4not announcedNo ROA

CIDR

173.205.128.0/17

IP Version

IPv4

Addresses

32.7K

Mask

/17 (255.255.128.0)

Country

🇺🇸 United States

City

Reston

Status

not announced

Allocated

Announced BGP Routes

0 of 0 routes

RPKI:

IRR:

Swipe sideways to see all columns →

Prefix	Origin AS	RPKI	IRR	Last Seen
This prefix is not announced as a whole. Parts of it are announced as more-specific prefixes, see below.

More-Specific Announcements

20 more-specific announcements

Prefix	Origin AS	RPKI	IRR	Last Seen
173.205.176.0/20	AS29838 AMC - Atlantic Metro Communications II, Inc.	No ROA	-	2026-10-11
173.205.192.0/24	AS54588 EQUINIX-EC-SV - Equinix, Inc.	No ROA	-	2026-10-11
173.205.196.0/24	AS54588 EQUINIX-EC-SV - Equinix, Inc.	No ROA	-	2026-10-11
173.205.197.0/24	AS54588 EQUINIX-EC-SV - Equinix, Inc.	No ROA	-	2026-10-11
173.205.198.0/24	AS54588 EQUINIX-EC-SV - Equinix, Inc.	No ROA	-	2026-10-11
173.205.199.0/24	AS54588 EQUINIX-EC-SV - Equinix, Inc.	No ROA	-	2026-10-11
173.205.200.0/22	AS53989 SWAYZEECOM - Swayzee Telephone Company, Inc.	No ROA	-	2026-10-11
173.205.200.0/24	AS53989 SWAYZEECOM - Swayzee Telephone Company, Inc.	No ROA	-	2026-10-11
173.205.201.0/24	AS53989 SWAYZEECOM - Swayzee Telephone Company, Inc.	No ROA	-	2026-10-11
173.205.202.0/24	AS53989 SWAYZEECOM - Swayzee Telephone Company, Inc.	No ROA	-	2026-10-11
173.205.203.0/24	AS53989 SWAYZEECOM - Swayzee Telephone Company, Inc.	No ROA	-	2026-10-11
173.205.204.0/23	AS10753 LUMEN-LEGACY-L3-CUSTOMER-SHARED-USE - Level 3 Parent, LLC	No ROA	-	2026-10-11
173.205.208.0/21	AS46450 PILOT - Pilot Fiber, Inc.	Valid	-	2026-10-11
173.205.216.0/24	AS20029 HCDL-DENVER-DATA-CENTER - H5 Data Centers	No ROA	-	2026-10-11
173.205.217.0/24	AS400828 HCDL-ATLANTA-DATA-CENTER - H5 Data Centers	No ROA	-	2026-10-11
173.205.218.0/24	AS400829 HCDL-SAN-ANTONIO-DATA-CENTER - H5 Data Centers	No ROA	-	2026-10-11
173.205.219.0/24	AS20029 HCDL-DENVER-DATA-CENTER - H5 Data Centers	No ROA	-	2026-10-11
173.205.220.0/24	AS397781 EWHEELERINC-01 - Linux Global	No ROA	-	2026-10-11
173.205.222.0/23	AS396305 CLARKSVILLECONNECTED - Clarksville Connected Utilities	Valid	-	2026-10-11
173.205.224.0/19	AS32953 MHCV-AS1 - Mid-Hudson Cablevision, Inc.	No ROA	-	2026-10-11

IRR Route Objects

Origin	Registry	Maintainer	Modified
AS33597	Other IRR	maint-as13768	2026-06-30

More Specific Prefixes

Prefix	AS	Country	Status
173.205.128.0/18		🇺🇸US	allocated
173.205.192.0/21		🇺🇸US	allocated
173.205.200.0/22	AS53989	🇺🇸US	allocated
173.205.204.0/23	AS10753	🇺🇸US	allocated
173.205.206.0/23	AS395575	🇺🇸US	allocated
173.205.208.0/21	AS46450	🇺🇸US	allocated
173.205.216.0/22		🇺🇸US	allocated
173.205.220.0/23	AS397781	🇺🇸US	allocated
173.205.222.0/23	AS396305	🇺🇸US	allocated
173.205.224.0/19	AS32953	🇺🇸US	allocated

Transfer History

Registry transfers of 173.205.128.0/17, blocks inside it, or blocks containing it.

173.205.206.0/23Transfer · 2020-01-22
Atlantic Metro Communications II, Inc.
🇺🇸 US ARIN
→
Optoro, Inc.
🇺🇸 US ARIN
173.205.222.0/23Transfer · 2019-10-11
Atlantic Metro Communications II, Inc.
🇺🇸 US ARIN
→
Clarksville Connected Utilities
🇺🇸 US ARIN
173.205.208.0/21Transfer · 2019-09-09
Atlantic Metro Communications II, Inc.
🇺🇸 US ARIN
→
Pilot Fiber, Inc.
🇺🇸 US ARIN
173.205.224.0/19Transfer · 2019-08-26
Atlantic Metro Communications II, Inc.
🇺🇸 US ARIN
→
Mid-Hudson Cablevision, Inc.
🇺🇸 US ARIN
173.205.216.0/22Transfer · 2019-08-09
Atlantic Metro Communications II, Inc.
🇺🇸 US ARIN
→
H5 Data Centers
🇺🇸 US ARIN
173.205.220.0/23Transfer · 2019-08-09
Atlantic Metro Communications II, Inc.
🇺🇸 US ARIN
→
Linux Global
🇺🇸 US ARIN
173.205.204.0/23Transfer · 2019-08-08
Atlantic Metro Communications II, Inc.
🇺🇸 US ARIN
→
Commercial Vehicle Group
🇺🇸 US ARIN
173.205.192.0/21Transfer · 2019-08-08
Atlantic Metro Communications II, Inc.
🇺🇸 US ARIN
→
Equinix, Inc.
🇺🇸 US ARIN
173.205.200.0/22Transfer · 2019-08-02
Atlantic Metro Communications II, Inc.
🇺🇸 US ARIN
→
Swayzee Telephone Company, Inc.
🇺🇸 US ARIN
173.205.128.0/17M&A · 2019-04-15
InfoRelay Online Systems, Inc.
🇺🇸 US ARIN
→
Atlantic Metro Communications II, Inc.
🇺🇸 US ARIN

Date	Resource	From	To	Type
2020-01-22	173.205.206.0/23	Atlantic Metro Communications II, Inc. 🇺🇸 US ARIN	Optoro, Inc. 🇺🇸 US ARIN	Transfer
2019-10-11	173.205.222.0/23	Atlantic Metro Communications II, Inc. 🇺🇸 US ARIN	Clarksville Connected Utilities 🇺🇸 US ARIN	Transfer
2019-09-09	173.205.208.0/21	Atlantic Metro Communications II, Inc. 🇺🇸 US ARIN	Pilot Fiber, Inc. 🇺🇸 US ARIN	Transfer
2019-08-26	173.205.224.0/19	Atlantic Metro Communications II, Inc. 🇺🇸 US ARIN	Mid-Hudson Cablevision, Inc. 🇺🇸 US ARIN	Transfer
2019-08-09	173.205.216.0/22	Atlantic Metro Communications II, Inc. 🇺🇸 US ARIN	H5 Data Centers 🇺🇸 US ARIN	Transfer
2019-08-09	173.205.220.0/23	Atlantic Metro Communications II, Inc. 🇺🇸 US ARIN	Linux Global 🇺🇸 US ARIN	Transfer
2019-08-08	173.205.204.0/23	Atlantic Metro Communications II, Inc. 🇺🇸 US ARIN	Commercial Vehicle Group 🇺🇸 US ARIN	Transfer
2019-08-08	173.205.192.0/21	Atlantic Metro Communications II, Inc. 🇺🇸 US ARIN	Equinix, Inc. 🇺🇸 US ARIN	Transfer
2019-08-02	173.205.200.0/22	Atlantic Metro Communications II, Inc. 🇺🇸 US ARIN	Swayzee Telephone Company, Inc. 🇺🇸 US ARIN	Transfer
2019-04-15	173.205.128.0/17	InfoRelay Online Systems, Inc. 🇺🇸 US ARIN	Atlantic Metro Communications II, Inc. 🇺🇸 US ARIN	M&A

Geolocation

Country🇺🇸United StatesUS

RegionVirginia

CityReston

Coordinates38.9448, -77.3368 ↗

Learn more

RPKI and ROAs explainedWhat RPKI valid, invalid and no ROA mean
RPKI validatorCheck ROA coverage for any prefix or ASN
What is BGP?How prefixes are announced and routed
More-specific prefixesGlossary: covering and more-specific routes
IPv4 transfer marketTransfers published by all five RIRs

API

Open

GEThttps://api.ipctl.io/v1/prefix/173.205.128.0/17

Returns prefix allocation, BGP routes, and more-specific subnets.

curl -s "https://api.ipctl.io/v1/prefix/173.205.128.0/17" | jq

External Links

RIPEstat