Data as of Nov 10, 2026
221.133.4.0/22
1 residential-proxy exit · 30 daysSai gon Postel Corporation
Residential-proxy exits
Proxy exits
1
0.10% of its addresses · 30 days
Spread
1 of 4
/24s with at least one exit
Providers
2
selling exits here
Oct 11, 2026 – Nov 8, 2026
Exits seen per day
1 observation
Proxy providers listing exits
- IPFly
- PuraRoute
Announcements
Less specific
Covering announcements
| Prefix | Origin | Type | Proxy exits | Holder | RPKI |
|---|---|---|---|---|---|
| 221.133.0.0/20 since Jun 2016 | AS7602 | Residential | 2 1 always on | Sai gon Postel Corporation |
Registrations in this block
The registry's network records over the announcement: those covering it, widest first, then every record inside it, under its parent.
| Range | Addresses | Netname | Holder | Type | Created | Abuse contact |
|---|---|---|---|---|---|---|
| 221.133.0.0/19 | 8,192 | SPT-VN | Sai gon Postel Corporation | ALLOCATED PORTABLE | — | hm-changed@ |
| └ 221.133.4.0/27 | 32 | dongabank-NET | Dong A Bank | ASSIGNED NON-PORTABLE | — | hm-changed@ via SPT-VN |
| └ 221.133.4.32/27 | 32 | SOMOTNET-VN | somotNET Co., Ltd | ASSIGNED NON-PORTABLE | — | hm-changed@ via SPT-VN |
| └ 221.133.4.64/27 | 32 | IPT-NET | IP Telecom Center | ASSIGNED NON-PORTABLE | — | hm-changed@ via SPT-VN |
| └ 221.133.4.96/28 | 16 | SPT-NET | Saigon Postel Corp. | ASSIGNED NON-PORTABLE | — | hm-changed@ via SPT-VN |
| └ 221.133.4.160/27 | 32 | SAIGONVIEW-NET | SaigonView | ASSIGNED NON-PORTABLE | — | hm-changed@ via SPT-VN |
| └ 221.133.4.192/27 | 32 | LEGEND-NET | Legend Hotel | ASSIGNED NON-PORTABLE | — | hm-changed@ via SPT-VN |
| └ 221.133.4.224/28 | 16 | STS-VN | SPT Corp. | ASSIGNED NON-PORTABLE | — | hm-changed@ via SPT-VN |
| └ 221.133.4.240/29 | 8 | BrainWorksVN-VN | BrainWorks Vietnam Co., Ltd | ASSIGNED NON-PORTABLE | — | hm-changed@ via SPT-VN |
| └ 221.133.4.248/29 | 8 | LOTTEMART-VN | Lotte Mart | ASSIGNED NON-PORTABLE | — | hm-changed@ via SPT-VN |
| └ 221.133.5.0/29 | 8 | cuchaiquantphcm-net | Cuc hai quan thanh pho HCM | ASSIGNED NON-PORTABLE | — | hm-changed@ via SPT-VN |
| └ 221.133.5.8/29 | 8 | mobileshop-net | 55B Pham Ngu Lao Mobile and Telecom Equipment Shop | ASSIGNED NON-PORTABLE | — | hm-changed@ via SPT-VN |
| └ 221.133.5.16/28 | 16 | IKEA_ | VPA?D IKEA Asia Pacific | ASSIGNED NON-PORTABLE | — | hm-changed@ via SPT-VN |
| └ 221.133.5.80/29 | 8 | DPA-vn | Dai Phuc An Media Corp. | ASSIGNED NON-PORTABLE | — | hm-changed@ via SPT-VN |
| └ 221.133.5.96/27 | 32 | SFONE-NET | S-Telecom | ASSIGNED NON-PORTABLE | — | hm-changed@ via SPT-VN |
| └ 221.133.5.128/27 | 32 | VNGT-VN | Trung tA?m Via? n ThA?ng Tha?? Ha?? Ma??i | ASSIGNED NON-PORTABLE | — | hm-changed@ via SPT-VN |
| └ 221.133.6.0/27 | 32 | ASCENDAS-VN | Ascendas Services Vietnam Pte.,Ltd | ASSIGNED NON-PORTABLE | — | hm-changed@ via SPT-VN |
| └ 221.133.6.32/27 | 32 | VTC-VN | VTC | ASSIGNED NON-PORTABLE | — | hm-changed@ via SPT-VN |
| └ 221.133.7.0/24 | 256 | Hosting-NET | KH Colo Servers moi | ALLOCATED NON-PORTABLE | — | hm-changed@ |
A contact marked “via” is the registry's: the record names none of its own, so the registry hands down its parent's.
Composition
The types across the prefix's announced space, by addresses.
Announced space
Address share
Announced space
Types across the prefix
1,024 addresses
| Type | Addresses | Share | Ranges | |
|---|---|---|---|---|
| Residential | 408 | 40% | 5 | |
| Business | 352 | 34% | 15 | |
| Hosting | 256 | 25% | 1 | |
| Mobile | 8 | 0.78% | 1 |
Network & registry
Origin network
AS7602
VN
- Name
- Sai gon Postel Corporation
- Type
- Internet provider
- Registered
- Aug 28, 2003
- Domain
- spt.vn
- Website
- www.spt.vn
- Industry
- Internet Service Provider (ISP)
- Spamhaus ASN-DROP
- not listed
Routing timeline
Covering aggregate above, the prefix's own history below
Summary
Routing history
- Pattern
- Stable
- First seen
- May 2005
- Current origin since
- Nov 2025 · 1.0 yr
- Origin networks
- 1
RPKI
Route origin authorizations
| ROA prefix | ASN | Max len | Anchor | Verdict |
|---|---|---|---|---|
| 221.133.0.0/19 | AS7602 | /24 | APNIC | RPKI valid |
IRR
Route objects on the exact prefix
IRR inside
Route objects inside
| Prefix | Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|---|
| 221.133.4.0/23 | AS7602 | NTTCOM | Proxy-registered route object | MAINT-AS9304 | Nov 4, 2017 |
| 221.133.4.0/23 | AS7602 | APNIC | SPT-VN | MAINT-VN-SPT | Sep 24, 2022 |
| 221.133.4.0/24 | AS7602 | RADB | Proxy-registered route object | MAINT-HGC-INTL | Oct 2, 2026 |
| 221.133.4.0/24 | AS7602 | APNIC | SPT-VN | MAINT-VN-SPT | Sep 24, 2022 |
| 221.133.5.0/24 | AS7602 | RADB | Proxy-registered route object | MAINT-HGC-INTL | Oct 2, 2026 |
| 221.133.5.0/24 | AS7602 | APNIC | SPT-VN | MAINT-VN-SPT | Sep 24, 2022 |
| 221.133.6.0/23 | AS7602 | NTTCOM | Proxy-registered route object | MAINT-AS9304 | Nov 4, 2017 |
| 221.133.6.0/23 | AS7602 | APNIC | SPT-VN | MAINT-VN-SPT | Sep 24, 2022 |
| 221.133.6.0/24 | AS7602 | NTTCOM | Proxy-registered route object | MAINT-AS9304 | Nov 4, 2017 |
| 221.133.6.0/24 | AS7602 | APNIC | SPT-VN | MAINT-VN-SPT | Sep 24, 2022 |
| 221.133.7.0/24 | AS7602 | NTTCOM | Proxy-registered route object | MAINT-AS9304 | Nov 4, 2017 |
| 221.133.7.0/24 | AS7602 | APNIC | SPT-VN | MAINT-VN-SPT | Sep 24, 2022 |
Whois
Registration for this announcement
- Range
- 221.
133. 0. 0/ 19 - Netname
- SPT-VN
- Registrant
- Sai gon Postel Corporation
- Registrant country
- VN
- Organization
- Sai gon Postel Corporation
- Org country
- VN
- Type
- ALLOCATED PORTABLE
- Created
- Not stated by the registry
- Updated
- Sep 26, 2022
- Maintainer
- MAINT-VN-VNNIC
- RIR
- APNIC
- Country
- VN
- Delegated
- Aug 6, 2003
- Status
- assigned
Report abuse
Abuse contact
- hm-changed@
vnnic. vn - Name
- IRT-VNNIC-AP
- Handle
- IRT-VNNIC-AP